Biology Quiz Online

BOTANY SET PRACTICE TEST

noreply@blogger.com (Unknown) — Sun, 13 Jul 2025 10:30:00 +0000

Botany Practice Test

Contemporary Environmental Issues Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Thu, 14 Dec 2023 16:14:00 +0000

1.The sum of diffused and diret solar radiation, is called
Continental solar radiation
Global solar radiation
Continental Solar radiation
Universal solar radiation

2.Which of the following greenhouse gases has contributed the most to the global warming
Methane
ozone
nitrous oxide
carbon dioxide

3.Which country has opted out of Paris Agreement on Climate change
USA
Canada
Australia
Russia

4.Following initiative under international efforts made to have household eco-friendly refrigerators:
Kyoto protocol
Montreal Protocol
CITES
Basal convention

5.International ozone day is celebrated on
21st April
5th June
22nd April
16th September

6.Snow blindness is caused due to:
Ultra-violet radiations
Excessive flux of visible radiations
Infra-red radiations
Microwave radiations

7.Ultaviolet radiations are lethal dur to inactivation of
Proteins, nucleic acid and pigments
Minerals, water and air
Carbohydrates, fats and vitamins
O2, CO2 and water

8.Which of the following does not lead to global warming
N20
Black carbon aerosols
Tropospheric ozone
Stratospheric ozone

9.Which of the following gases faclitates formation of tropospheric ozone
NO2
CO
SO2
NH3

10.Laterite soil
Regolith soil
Red soil
Black cotton soil
Glacial soil

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Statistical Approaches and Modelling in Environmental Sciences Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Thu, 14 Dec 2023 06:16:00 +0000

1.To find out the degree of linearrelationship between age and height of trees, the parameter to be estimated is
Standard error
median
Standard deviation
correlation coefficient

2.Which of the following is a normal variable?
Level of rainfall (Mild, Moderate, Severe)
Blood group type (A,B, AB, O)
Height of a tree
Socio-economic status (Low,Middle, High)

3.Time clocked by an athlete in a 100m race is an example of which type of variable?'
Discrete
Oridnal
Continuous
Normal

4.Which of the following measures of skewness is based on the distance of upper and lower quartiles from median value in a dataset
Karl pearson's coefficient of skewness
Kelly's measure of skewness"
Bowley's coefficient of skewnwss
Coefficient of skewnwss based on moments

5.Graphically depicting a group of numerical data through their Quartile is
Histogram
Pie chart
Frequency polygon
Box plot

6.A good sample design should result in:
A truly representative sample
unsystematic bias
A truly represntative sample
Highly varied sampling error

7.The term parameter is attribute associated with the data pertaining to
Sample
Population
Descriptive statistics
Sampling technique

8.Which one of the following conditions would indicate that the daataset is not bell shaped?
The mean is much smaller than medium
The range is equal to five times the standard divation
The range is larger than interquartile range
Development of community walls

9.The following statistical test is used to ascenrtain whether there is significant difference between the variances of two sets of observations
t-test
f-test
chi square test
Regression

10.In symmetrical distribution Pattern
Building construction project
Oil refinery project
Conservator Of Forests
Chief secretary of the Goverment

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Practice more: Practice Test on Environmental Science

Environment Assessment, Management and Legislation Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Thu, 14 Dec 2023 06:10:00 +0000

1.The notification of environment impact assessment under the provision of environmental (Protection) Act, 1986 was carried out for
River valley projects
Developments projects
Tourism Projects
Municipal Waste management

2.Which among the following is the first major environmental protection act to be promulgated in India?
Biological diversity act
Environmental Protection Act
Forest Conservation Acts
Wildlife Protection Act

3.Which of the following is related to 'MARRAKESH ACCORDS'
The earth summit 1992
Berlin Mandate 1995
Geneva Convention 1996
Kyoto Protocol 1997

4.What is the maximum period valid for granting environment clearance (EC) for mining projects?
30 Years
10 Years"
5 Years
20 Years

5.The Brundtland commision report was entitled
Limits to Growth
Our common future
Sustainable Development
Tragedy of commons

6.Cartagene protocol deals with
waste management
biosafety
Natural resource management
Protection of plant variety

7.Power to issue notification reserving the trees or class of trees in a protected forest lies with
Ministry of environment, forest and climate change, GOI
Biodiversity board
State goverment
Central goverment

8.Which type of projects usually require EIA
Community garden development
Mining and mineral development projects
Outdoor recreation
Development of community walls

9.Which one of the following convention/ protocols/ treties is legally binding on the signatory countries?
Basel convention
Montreal protocol
Paris agreement
Kyoto Protocol

10.Public hearing is not mandatory for project like
Building construction project
Oil refinery project
Conservator Of Forests
Chief secretary of the Goverment

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Solid and hazardous waste management Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Wed, 13 Dec 2023 15:27:00 +0000

1.Process of thermal degradation of solid waste in the absence of oxygen is referred to as
Incineration
Pyrolysis
Gassification
Sublimation

2.The abandoned, idlet or under used industrial and commercial facilities, where expansion or redevelopment is complicated by real or perceived contamination, are defined as
Greenfields
Landfills
Brownfields
Greyfields

3.Which method is most appropriate for separating tin cans from aluminium cans in municipal solid waste
manual sorting
shear shredding
pelletizing
magnetic field separation

4.Name the low heat thermal process that destroys the pathogen in biomedical waste by heating that occurs inside the waste material
microwave
autoclave
pyrolysis
hydroclave

5.Hardening of the steel releases the hazardous waste containing
Brine sludge containing mercury
lead bearing residues
tar containing waste
Cyanide nitrate containing sludge

6.Among the following methods, the most cost effective method for treating the infectious waste from hospitals is
autoclaving
deep burial
incineration
fumigation

7.Which one of the following methods converts decomposed liquid or solid hazardous organic waste effectively?
HO2
CO2
NO2
SO2

8. Which one of the following is not a part of 'Waste Reduction' strategy?
Reduced use of raw material
Material Reuse
Recycling of waste
Decreased toxicity

9.Which one of the following has maximum destruction and removable efficiency?
Incineration
Landfill
Biological Treatment
Chemical treatment

10.Which statement is not correct for hazardous wastes
They contain one or more of 39 toxic compounds
They catch fire easily
They are non reactive and stable
They are capable of corroding metal containers

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Environmental Pollution and Control Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Wed, 13 Dec 2023 14:24:00 +0000

1.Bahaviour of the plume, when stack is under temperature inversion layer, is termed as
Fanning
Conning
Fumigation
Lofting

2.National ambient air quality standards typically include following components
maximum and minimum pollutant levels, adjustment for
Abetment strategies, non attainment penalties
Ambient temperature, size, distribution and relative humidity
Indicator(Chemical/chemical class), Averaging time, Pollutant form and level

3.Carbon monoxide is harmful to human beings, as it:
Causes cancer
causes eye irriration
depletes ozone layer
has high affinity with haemoglobin as compared to oxygen

4.What is the sound pressure level (in dB) associated witha root mean square pressure of 100 Pa?
148 dB
134 dB
120 dB
110 dB

5.Which of the following particulate control devices has the poorest removal deficiency for particles in the sub -micron size range
Cyclone
Fabric filter
Venturi scrubber
Electrostatic precipitator

6.Which of the following is aprimary air pollutant
Surface ozone
Sulphate
black carbon
nitrate

7.pH of dust free and unpolluted rainwater is 5.6 due to dissolution of
HO2
CO2
NO2
SO2

8. Temporary hardness is caused by
Calcium sulfate
Magnesium sulfate
Magnesium carbonate
magnesium chloride

9.Ultrafilteration does not allow which of the following to pass through?
viruses
bacteria
small organic molecules
colloidal particles

10.One of the natural causes of occurrence of inland soil alkalinity is the presence of
sodium chloride
sodium carbonate
sodium hypochlorite
potassium nitrate

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Energy and Environment Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Wed, 13 Dec 2023 11:03:00 +0000

1.During the estimation of geothermal resources, which of the following is NOT considered?
Depth, thickness and extent of geothermal aquifer
Fossil content of rocks
Properties of rock formation
Salinity and geochemistry of fluid present in aquifer

2.Shale gas is natural gas which is mainly dominated by
Methane
Ethane
Butane
Propane

3.Bioenergy is a form of
Conventional Energy
Renewable energy
Unconventional energy
Renewable energy

4.Which process facilitates conversion of raw fat into biodiesel in the presence of alcohol?
Torrefaction
Transesterification
Saccharification
Glycerol conversion

5.The destructive distillation of coal yielding products such as gasoline, diesal oil and other products, is known as
gasification
precipitation
condensation
liquefaction

6.Yaw control used in wind turbine generator is
Microprocessor based control unit
The mechanism to keep the rotor axis along the wind directon
the mechnism to keep the rotor axis perpendicular to wind direction
Gear mechanism to control the speed of the rotor when wind speed is extremely high

7.Which of the following parameters provides information on ignition quality of diesel?
Octane number
Iodine value
Acid value
Cetane number

8.Maximum sulfur content is found in which grade of coal?
Bituminous
Lignite
Sub-bituminous
Anthracite

9.Which of the following fuels has minimum nitrogen content?
Crude oil
CNG
Producer gas
LPG

10.Which biofuel is widely used in many countries as motor fuel?
Methane
Ethanol
Butanol
Biodiesel

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Environmental Geosciences Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Wed, 13 Dec 2023 09:36:00 +0000

1.Element Which are not easily accommodated in the structure of the principal igneous minerals are called
Trace elements
Insoluble elements
Unfriendly elements
Incompatible elements

2.The boundary between fresh and salty groundwater along shortlines is determined by
Nature aquifer
Rainfall
Composition of salty and fresh groundwater
Recharge and Discharge in freshwater aquifer

3.Which of the following is an INCORRECT statement
Humus represnts organic matter, dark in colour
Acid soils are devoid of basic cations
Humus contains cellulose and hemi cellulose
Humic and fulvic acids in humus form hydrophobic colloid whereas clay colloids are hydrophilic in nature

4.Which one maong the following is not an example of dentrial sedimentary rocks?
Shale
Sandstone
Conglomerate
Chalk

5.Besides steam, next gas in order of abundance emitted from a volcanic erption is
Sulphuyr dioxide
Carbon dioxide
Nitrogen dioxide
Carbon monoxide

6.La lina is a spanish word meaning
The little boy
The daughter of the ocean
The little girl
The son of the ocean

7.Hardness of minerals depends on
Taiga
Parent material
Chemical composition and atomic constitution
Physical makeup and atomic consitution

8.Which is the first mineral to form in cooling magma?
Mica
Quartz
Olivine
Potassium feldspar

9.Seismic waves travel faster through
Gas
Liquid
Solid
Lava

10.Beaufort scale is used to classify which of the following meterological parameters?
Pressure
Precipitation
Wind direction
Wind velocity

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Environmental Biology Practice Test | Environmental Science Quiz

noreply@blogger.com (Unknown) — Tue, 12 Dec 2023 15:00:00 +0000

1.Most plants can absorb nitrogen only in the form of
Nitrite ion
Dinitrogen ion
Ammonium ion
Nitrate ion

2.With the change in environmental conditions, species that are not adapted to such changed conditions disappear. This phenomenon is called
Natural extinction
Mass extinction
Species migration
Anthropogeniconic extinction

3.Which zone of pond/lake ecosystem does not receive light?
Littoral
Limnetic
Profundal
Epilimnion

4.Influx of high nutrient load of nitrates and phosphates into an aquatic ecosystem contibutes towards
Oligotrophication
Poor primary production
Extreme oligotrophication
Eutrophication

5.Which group of microorganisms dominate in glacial ecosystem?
Psychrophiles
Acidophiles
Thermophiles
Mesophiles

6.The abilty of an ecosyem to recover when the system has been ditributed by any perturbation is known as
Resistance
Homeostasis
Climax
Resilience

7.Two of the following biomes has the largest area?
Taiga
Desert
Rain forest
Grassland

8. Two important characteristics of any populations are
Diversity and density
Frequncy and density
Density and dispersion
Abundance and Dispersion

9.The largest unit, in which gene is possible, is
Population
Genus
Family
Species

10. Which forest type has the highest percentage cover in the county
Tropical deciduous
Mangrove
Tropcical evergreen
temperate deciduous

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Practice Test on Environmental Chemistry | Environmental Science Quiz

noreply@blogger.com (Unknown) — Tue, 12 Dec 2023 14:14:00 +0000

1.Identify the environment system with lowest entropy
Land in monoculture agriculture sustained by high energy input
coal reduced to CO2
Polluted rivers
Soil containing a balanced community of living organisms

2.Which method is used to separate proteins on the basis of their sizes?
Ion exchange chromatography
Thin layer chromatography
Gel Filtration Chromatography
Adsorption Chromatography

3.Which among following is short lived species in the atmosphere?
CH4
CO
N2O
OH radical

4.The nightime troposperic chemistry is dominated by which of the following chemical species?
Nitrate ions
Ozone molecules
Nitrate radicals
Hydroxyl radical

5.Which of the following chemical oragnic species is/are insoluble in acid or alkali?
Humin
Humic acid
Fulvic acid
Both humic acid and humin

6.Toxicity of which of the following metals is not due to reaction with sulfhydryl group?
Arsenic
Lead
Cadmium
Chromium

7.Among the following, which one is the most hazardous chemical in the atmosphere?
Dioxin
Carbon monoxide
Halons
Carbon monoxide

8. Which of the following is a major photochemical oxidant?
PAN
Ozone
Aldehydes
Peroxybenzoyl nitrate

9.Under aerobic biodegration of DDT, which of the following compound is formed?
DDD
DDN
DDE
DDS

10. Chemically phytochelatins are
proteins
lipids
polysaccharides
Polypeptides

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Practice Test on Fundamentals of Environmental Science | Environmental Science Quiz

noreply@blogger.com (Unknown) — Tue, 12 Dec 2023 09:48:00 +0000

1.Continutity equation expresses the law of conservation of
mass
momentum
energy
entropy

2.What percent of visible radiation accounts for total solar radiation incident on top of atmosphere?
7
41
56
75

3.Which of the following frequencies is best for height meausrement?
P-band
C-band
X-band
Ku-band

4.Which instrument is used to measure total irradiance?
Pyrheliometer
Anemometer
Pyranometer
Hygrometer

5.Which one among the following is Not a form of precipitation?
Snow
Hail
Sleet
Fog

6.Spectral response pattern of leaves in healthy vegetation in SWIR region of EMR is primarily a function of
Leaf parenchyma
Chlorophyll content
presence of waxy layer on epidrmis
water content of the leaf

7. The heat is distributed through a vertical mixing process called
Advection
Diffusion
Turbulance
Convection

8. When the temperature of the atmosphere falls at a rate greater than dry adiabatic lapse rate, the atmosphere is
stable
highly stable
unstable
conditionally unstable

9.Photoionization of gas molecules maintain the temperture profile of which atmospheric layer?
Troposphere
Stratosphere
Mesosphere"
Thermosphere

10. Tropical cyclones occur on
meso scale
Micro scale
Planetary scale
Synoptic scale

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Environmental Science Practice Test | UGC NET Exam

noreply@blogger.com (Unknown) — Thu, 07 Dec 2023 05:45:00 +0000

1.The wavelength range of UV-C radiation is
320-400nm
280-320nm
100-1500nmm
240-280nm

2.Lightening in the atmosphere produces
NO
CO
CO2
NH3

3.The principal comeponents of photochemical smog in urban areas are
SO2 and NO2
SPM and CO
SPM and NO2
Hydrocarbons and Ozone

4.Natural gas is composed primarily of
Methane
n-butane
n-octane
A mixture of n-octane and n-butane

5.Which of the following chemical species of mercury is highly toxic to living system?
Mercurous ion
mercuric ion
organo mercurials
atomic mercury

6.Which one of the following is a waste recycling method of solid waste management
composting
Sanitary landfill
Pelletisation
Incineration

7. The acidity of normal rain water is due to
CO2
Cl2
NO2
SO2

8. Pyramid of trophic levels is alwyas upright in case of
Biomass
Number
Energy
All of the above

9.Which one of the following is an endoenzyme in soil
Cellulase
Invertase
Protease
Dehydrogenase

10. Walkley and Black rapid titration method is used for the determination of
Organic carbon content of soil
nitrate content of soil
phosphate content of soil
Fluoride content of soil

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Cell Communication and Cell Signaling Practice Test | CSIR UGC NET JRF Life Sciences Exam

noreply@blogger.com (Unknown) — Sun, 03 Dec 2023 09:40:00 +0000

1.Electric synapsis and siganlaing are communicated by
Neurotansmitters
Hormones
Gap junctions
Membrane proteins

2.Which of the following is NOT a second messanger?
Cyclic GMP
Diacylglycerol
Inositol triphosphate
Phosphatidyl inositol

3.C-AMP is directly involved in regulation of
Adenylate cyclase
Protein kinase A
ATP
Phosho frucotokinase

4.Which of the protein/enzyme leads to apoptosis
Cyclin B
Catalase
Bcl2
Caspase

5.Receptors for sigaling for steroid hormones are located at
intracellular
no receptor
plasma membrane
Organelle membrane

6.The essential mineral required for cell adhesion molecule, cadherin is
calcium
magnesium
iron
sodium

7.Which one of the following is a type of intercellular junction in animal cells?
Middle lamella
Glycocalyx
Plasmodesmata
Desmosomes

8.Which of the following is most likely to be activated in non -canonical Wnt pathway?
RhoA and PLC
GSK-3 and RhoA
Disheveled and GSK-3
Disheveled and APC

9.Cancer cells secretes channels such as VEGF for angiogenesis, whose target cells are
RBC
Platelets
Endothelial cells
B-cells

10.Which of the following which organelle is involved in apoptosis?
Lysosome
ER
Golgi
Mitochondria

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Developmental Biology Practice Test | CSIR UGC NET JRF Life Sciences Exam

noreply@blogger.com (Unknown) — Sun, 03 Dec 2023 07:49:00 +0000

1.Homeotic genes are responsible for
development of anatomical structures
homeostasis
cell cycle regulation
adaptation to stress

2.The ability of cells to achieve their respective fates by interacting with other cells is known as
induction
competence
autonomous specification
Conditional specification

3.Which statement is true about progenitor cells?
they cannot divide
they are same as stem cells
they can divide but do not remain undifferentiated
thay are totipotent cells

4.The cells of inner cell mass of a blasocyst stage mammalian embryo are
totipotent
pluripotent
multipotent
unipotent

5.Specific-specific adhesion of sperm to the egg during sea urchin fertlization, involves the interaction of the sperm adhesive preotein
Avidin
Fertilin
EBR1
Bindin

6.Which is true for amount of yolk and cleavge in egg of amphibian
mesolecithal and holoblastic cleavage
Isolecithal and holoblastic cleavage
Mesolecithal and meroblastic cleavage
microlecithal and meroblastic clevage

7.Which kind of clevage is shown in mammals?
Meroblastic radial
Holoblasic radial
Meroblastic rotational
Holobastic rotational

8.Which one of the following is NOT a typical movement pattern obseved during gastrulation?
Involution
Epiboly
Furrowing
Delamination

9.Which one of the following developmental processes in animals is more dependent on cellular movements
pattern formation
growth
morphogenesis
cell differentiation

10.Dorsal mutant in Drosophila will result in
Dorsalization of ventral side
ventralization of dorsal side
there would be no effect
anterior-posterior pattern information will be effected

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Plant System Physiology Practice Test | CSIR UGC NET JRF Exam

noreply@blogger.com (Unknown) — Thu, 30 Nov 2023 14:54:00 +0000

1.Which of the following mechanism is NOT involved in providing photo protection to plants
thermal dissipation
photolysis of water
degradation of D1 protein
zeaxanthin formation

2.DCMU inhibits electron transport in chloroplast by preventing the reduction of
P680
PQ
QA
QB

3.The CO2 compensation point for C3 plants is greater than C4 plants because in C3 plants
dark respiration is higher
dark respiration is lower
Photorespiration is present
photorespiration is absent

4.During the operation of C2 oxidative photosynthetic cycle, which of the following metabolites is transported from chloroplats to peroxisome
Glycine
Serine
Glycolate
Glycerate

5.The alternate pathway of respiration can be inhibited by
Cyanide
SHAM
Ampicillin
Arachidonic acid

6.Among the following which microorganism is involved in nitrogen fixation with woody trees?
Frankia
Azotobacter
Azospirillum
Rhizobium

7.Nitrogenase, a complex metal containing enzyme is involved in conversion of N2 to NH3. Which one of the following metal is NOT involved in the activity of nitrogenase
Iron(Fe)
Cobalt (Co)
Vanadium (V)
Molybdenum (Mo)

8.Out of several gibberellins identified in plants, which one of the following is NOT bioactive
GA1
GA3
GA4
GA5

9.S-adenosyl methionine is a precursor of which plant hormone
ABA
Auxin
Ethylene
Cytokinin

10.Chromophore associated with phytochrome of plants is
Pterin
Beta carotene
Phycobilin
Flavin adenine dinucleotide

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Animal System Physiology Practice Test | CSIR UGC NET JRF Life Sciences Exam

noreply@blogger.com (Unknown) — Thu, 30 Nov 2023 09:39:00 +0000

1.The only bone marrow cell that never appears in peripheral blood is
myeloblast
myelocyte
lyphoblast
megaloblast

2.Which one of the following functions is NOT served by the plasma proteins?
blood clotting
oxygen transport
buffering capacity of blood
hormone binding and transport

3.Which one of the following is NOT involved with the pacemaker potential of heart?
h-channel
f-channel
long-lasting calcium channel
Transient calcium channel

4.Different leads are used to record ECG of humans. Which one of the following is NOT unipolar leads?
Augmented limb leads
V1 and V2 leads
Standard limb leads
VR and VL leads

5.Athletes are usually trained at high altitudes because
To increase the number of RBC
To form modified haemoglobin
To increase number of WBC
To increase the amount of globulin proteins

6.The type I glomus cells present in the carotid bodies contain granules which release some substnces during hypoxia. which one of the following is released in hypoxia?
GABA
IL8
Dopamine
Autosomes

7.There is small gao between two neuron at synapses. The purpose of gap is
Unidirectional flow of information
Slow down speed of propagation
Reabsorption of neurotransmitter
coupling of charge over membrane

8.Hawk's retina possesses a large number of
rods
melanocytes
cones
kuffer cells

9.Filtration slits are formed by
podocytes
lacis cells
mesangial cells
endothelial cells of capillary

10.Substrate for Renin, also called angiotensinogenase, is
Renin
Angiotensin I
Angiotensis I
Angiotensinogen

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Inheritance Biology Practice Test |CSIR UGC NET JRF Life Sciences Exam

noreply@blogger.com (Unknown) — Thu, 30 Nov 2023 07:10:00 +0000

1.All of the Mendelian alleles for different traits showed
Epitasis
Co dominance
Incomplete dominance
Dominance and recessiveness

2.In a genetc 9:7 ratio in F2 generation represents
Epistasis
co-dominance
incomplete dominance
complete dominance

3.A cross is made between two plants with white flowers. All the F1 progeny had red colored flower. This is because of
reversion
translocation
reversion
complementation

4.A gene inherited from mother is not expressed in the offspring, but the same gene when inherited from father is expressed in both male and female offspring. This phenomenon is the hallmark of gene
silencing
recombination
delection
imprinting

5.Dosage compensation in mammal females is achieved by
Methylation of one x chromosome
Hyper activation of one x chromosome
Elimination of one x chromosome
Hypoactivation of Both X chromsome

6.Criss-cross inheritance is shown by
Sex linked traits
Sex influenced traits
Sex limited traits
Autosomes

7.Ratio of observed double crossover frequency to the expected frquency to the expected frequency of double crossover gamaete during three point test cross is termened as
Coefficient of variance
Coefficient of suppression
Coefficient of Coincidence
Coefficient of interference

8.Molecular marker cannot be utilised for
mapping of genes
Identifying the clones
Identifying the locus of gene on chromosome
Identifying the expressed product

9.Extra-chromosomal inheritance can be dected by
Back cross
Test cross
Reciprocal cross
Dihybrid cross

10.The distance between bacterial genes as determined from interrrupted mating experiments are measured in units of
cM
minutes
bp
micromeeters

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Diversity in Life Forms Practice Test | CSIR UGC NET JRF Life Sciences Exam

noreply@blogger.com (Unknown) — Wed, 29 Nov 2023 13:11:00 +0000

1.Besides nomenclature of plants in wild, ICBN also gives binomial names for
Fungus
Bacteria and Fungus
Cultivated Plants
Fungus and Cultivated Plants

2.Phenetic classification is based on
Genetic relationship
Anatomical and embrylogical characters
Overall similarities of characters and gaps between variations
Phylogenetic relationship

3.Cladistic classification is based on?
sequential order in which branches arise from a phylogenetic tree
the order of sequence divergence
morphological features and skeleton of individuals
cellular organization and cytoskeleton

4.If you want to divide a human body into dorsal and ventral sections, what plane will you use?
coronal
sagittal
transverse
abdomino-pelvic

5.Branchiostoma is a
deuterostome and schizocoelomate
protosome and schicocoelomate
deuterostome and enterocoelomate
protosome and enterocoelomate

6.The character that is shared by Arthropoda and Annelida is
Joint Appendages
open circulatory system
exoskeleton made up of chitin
segmental arrangement of muscles

7.Pearl oysters are obtained from the genus
Pila
Pinctada
Oysteria
Mytillus

8.Mammalian jaw has evolved from
Temporal bone
Pharyngeal arches
Frontal bone
Dentary and Squamosal bones

9.The phylum in which the animals are bilaterally symmetrical in the larval stage and radially symmetrical in the adult stage is
Mollusca
Nematoda
Echinodermata
None of these

10.In transverse sections of a young stem, if vallecular canals and carinal canals are present, then the plant belongs to
Lycopodiales
Isoetales
Selginellales
Equisetales

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Ecological Principles Practice Test | CSIR UGC NET JRF Life Sciences Exam

noreply@blogger.com (Unknown) — Wed, 29 Nov 2023 09:27:00 +0000

1.A general increase in the average body mass of animal population within a species with latitude is known as
Allen's rule
Allee effect
Bergmann's rule
Hamilton's rule

2.The characteristics survivorship curve III is shown by
Birds
Humans
Pelagic fishes
Fruit flies

3.Among the following which combination shows positive relationship?
Generation time and animal Size
Generation time and intrinsic rate of growth
Animal size and number of offspring
Longevity and number of offspring

4.The Hutchinsonian concept of ecological niche is based on
microhabitat occupied
multidimensional hypervolume
role played in the ecosystem
a combination of role played and microhabitat occupied

5.Characteristic feature of K selected species is
High intrinsic rate of growth
small size and large number of offspring
First reproduction at later stage of life
Short life span

6.Which statement is correct for r selected species?
Large number of progeny with large size
Large number of progeny with small size
Small number of progeny with large size
Small number of progeny with small size

7.Positive-Negative type of interaction (+-) type of interaction is seen in
Predation, Parasitism
Predation, Commensalisms
Parasitism, Mutualism
Mutualism, protocoperation

8.Maximum biodiversity occurs at
Tropics
Poles
Equator
Temperate

9.Which of the following is characteristic feature of climax community
Simple food chain
High resilience
High producityivity
Narrow niche width

10.The utilization or consumption efficiency of herbivores is highest in
Plankton communities of ocean waters
mature temperate forests
managed grasslands
managed rangelands

Score =
Correct answers:

Evolution and Behavior Practice Test | CSIR UGC NET JRF Exam

noreply@blogger.com (Unknown) — Wed, 29 Nov 2023 07:47:00 +0000

1.Among the following the living fossil is:
Trilobite
Peripatus
Archaeopteryx
Dinosaurs

2.Which of the following is an example of Convergent evolution(homoplasy)?
The wings of birds and bats
The hemoglobin gene family
The ribosomal RNA genes
The number of toes on horses and humans

3.Selection which operates against any direction and do not allow to disrupt the existing mean is termed as
Directional
Stabilizing
Disruptive
Balancing

4.Recent Studies on Archae suggest that life could have originated
Extra terrestrially and seeded through meteorite impacts
in shallow coastal areas
in deep hydrothermal vents
in hot, terrestrial habitats

5.The correct hierarchy of geological times is :
eon>era>period>epoch
period>era>epoch
epoch>period>era>eon
era>eon>period

6.After gull nest;ings hatch, the parents rmove the egg shells from the nest. The behaviour is to
Hygromycin
Ampicillin
Streptomyci
minimize nest detection by predators

7. The behaviour of a leopard killing an antelope or a deer grazing on spring grass for food is referred to as?
Competition
Interaction
Predation
Mutualism

8.Eusocial societies are NOT characherized by which of the following?
Atruism
Kin selection
Guarding ahainst intruders
Equal reproductive opportunities

9.Circadian rhythms in humans are controlled by
Medulla
Cortex
Pituitary gland
Suprachaismatic nucleus

10.Competion for mates and variance in fitness in higher among females than among males in which of the following animal mating systems?
Monogamy
Polygyny
Polyandry
Sequential monogamy

Score =
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Practice Test on Applied Biology | CSIR UGC NET JRF Exam

noreply@blogger.com (Unknown) — Wed, 29 Nov 2023 06:05:00 +0000

1.Which of the following microbial fermentations are anaerobic?
Ethanol and acetone -butanol
Pencillin and Vitamin B12
Streptomycin and Rifampicin
Citric acid and Propionic acid/

2.In tissue culture experiment to initiated shoots from undifferentiated mass of cell the medium must contain
Low auxin and high cytokinin
High auxin and high cytokinin
high auxin and low cytokinin
low auxin and low cytokinin

3.Which microbe has ben used against insect plant pathogens?
Agrobacterium tumefaciens
Agrobacterium rhizogenes
Bacillus thuringenesis
Fusarium nudum

4.To increase the shelf life of tomato, which of the following genes should be silenced?
ACC synthase
EPSP synthase
PEP carboxylase
ABC transporter

5.Which of the following GM crops is the most widely cultivated globally?
Herbicide resistant soyabean
Insect resistant cotton
Insect resistant brinjal
delayed ripening tomato

6.Neomycin phospho-transferase gene, frequently used as selection marker during plant transformation, inactivates which one of the antibiotics?
Hygromycin
Ampicillin
Streptomyci
Kanamycin

7. TILLING is areverse genetics approarch used in functional genomics. Which one of the following is used for TILLING?
T-DNA tagging by Agrobacterium mediated transformation
Transposon tagging using Ac/Ds elements
Mutagenesis with ethylmethane sulphonate
Protoplast transformation by eletroporation

8.Integrity of introduced transgene in mouse can be validated by
Male pronuclear insertion
Fusion of enucleated egg with somatic cells
Transfer into competent embryonic cell
Southern blot analysis

9.To prepare individual tissue cells from a primary culture, the cell- cell and cell matrix interaction must be broken. To achieve this would Not Use:
EDTA
Trypsin
Collagenase
Separase

10.Which is the Best Method for screening of plants for bioprospecting?
Ecological Studies
Ethano driven
Comparison of DNA sequence
Comparison of Protein sequence

Score =
Correct answers:

Practice Test on Methods in Biology | CSIR JRF NET Life Sciences

noreply@blogger.com (Unknown) — Mon, 27 Nov 2023 05:42:00 +0000

1.Chromosomes of Yeast and Protozoa are best separated using ?
Visible microscopy
Electon microscopy
PAGE
Pulse Field Gel Electrophoresis/

2.In western blotting based HIV diagnosis technique, the patient sample is screened for
Antigen
Antibody
Virus outer coat protein
Virus

3.Which one of the methods listed below is the most sensitive label free quantification methods for proteins
UV Spectroscopy
Infra red spectroscopy
Raman Spectroscopy
13C content of protein

4.Which one of the following statements regarding normal distributionis not correct?
It is symmetric around the mean
It is symmetric around the median
It is symmetric around the mode
It is symmetric around the variance

5.If a metabolically active cell is chalenged with 55Fe radioisotope label, which of the following proteins cannot be detected by autoradiography
Aconitase and lipoic acid synthase
Cytochrome C and DNA Primase
Calmodulin and Calcineurin
Myoglobin and Homoaconitase

6.The movement of a single cell wall required to be continually monitored during development. This cell was marked with reporter gene to visualise this movement one would use
Phase Contrast Microscopy
Bright Field Microscopy
Atomic Force Microscopy
Fluorescence Microscopy

7. Which instrument is used to measure electrical acitivity of heart
Electrocardiograph
Electrocardiogram
Electroencephalogram
Sphymomanometer

8.In remote sensing, which one of the following formulae is used for the calculation of normalised difference vegetation Index (ndvi)
RED/(NIR+RED)
RED/(NIR-RED)
(NIR+RED)/(NIR-RED)
(NIR-RED)/(NIR+RED)

9.Measurement and mapping with spatial resolution the membrane potential of a cell, which is too small for microelectrode impalement, is done using
radioisotope
Vital dyes
Voltage -sensitive dye
pH sensitive chemical

10. Membrane potential in mitochondria critical for oxidative phosphorylation and is monitored by
Patch clamping
Measuring the consumption of ATP
Measuring distribution of labelled ions across the mitochondrial membrane
Measuring internal sodium ions after lysing the mitochondria

Score =
Correct answers:

O Level Biology Practice Test

noreply@blogger.com (Unknown) — Fri, 24 Nov 2023 14:50:00 +0000

1.Which structures are found in animal cells and in plant cells? 1 mitochondria, 2 cell wall, 3 ribosomes, 4 sap vacuole
1 and 3
1 and 4
2 and 3
2 and 4

2.A student draws a red blood cell. The drawing is 20mm in diameter.This red blood cell is actually 0.008mm in diameter. What is the magnification of the cell shown in the drawing?

×40
×250
×2500
×40000

3.The diagram shows some of the features used to classify animals in the phylum arthropods.In the diagram, which letter, A, B, C or D, could represent insects?

A
B
C
D

4.Which processes can only occur through a membrane?

A
B
C
D

5.A student cuts four cylinders from a potato.Each cylinder is 30mm long. The cylinders are all of the same diameter.The potato cylinders are placed in sugar solutions of different concentrations. After one hour, the lengths of the cylinders are measured again. The results are shown in the table.Which sugar solution has a water potential closest to that of the potato cells?

A
B
C
D

6.An area of grass plants becomes flooded with sea water. Sea water contains a higher concentration of salt than the root hair cells of the grass plants. What is the effect of the sea water on the functions of the root hairs?

A
B
C
D

7. Large biological molecules are made from smaller molecules. Which row shows the correct molecules?

A
B
C
D

8.Enzyme action can be explained by the lock and key hypothesis. Which row is correct for the active site and for the substrate?

A
B
C
D

9.The diagrams show an experiment to find the rate of photosynthesis in an aquatic plant in different conditions. Which plant produces the most bubbles per minute?

A
B
C
D

10. A student grows young plants in four different test-tubes.Tube W contains all the mineral ions needed for healthy plant growth. The diagram shows the appearance of the plants after two weeks.

Choose the correct answer from the options below What do tubes X, Y and Z contain?

A
B
C
D

Score =
Correct answers:

AS Level Biology Practice Test

noreply@blogger.com (Unknown) — Fri, 24 Nov 2023 14:49:00 +0000

1.An enzyme hydrolyses a phospholipid molecule to release a fatty acid.What is the name of the bond that is broken in this hydrolysis reaction?
Ester
Glycosidic
Peptide
Phosphodiester

2.Convalescent plasma immunity is one method used to treat patients infected with Ebola virus disease (EVD). In this method, blood plasma is taken from a person who has recovered from EVD and is injected into the patient with the EVD infection. Which of the options describes this form of immunity?
Artificial active immunity
Artificial passive immunity
Natural active immunity
Natural passive immunity

3.A student is studying three unicellular organisms: the bacterium Escherichia coli, the protoctist Euglena gracilis and the fungus Saccharomyces cerevisiae. Which feature is common to all three unicellular organisms?
Cell wall
Mitochondria
Nucleus
Ribosomes

4.Which option describes the correct process of blood clotting?
Platelets convert into insoluble fibrin to trap erythrocytes.
The insoluble plasma protein fibrinogen converts into soluble fibrin to trap erythrocytes.
The soluble plasma protein fibrinogen converts into insoluble fibrin to trap erythrocytes
The soluble plasma protein fibrinogen converts into soluble fibrin to trap erythrocytes

5.Diseases can be caused by many different types of pathogen. Which row matches the disease to the correct pathogen?

A
B
C
D

6.The diagram shows the changes in pressure in the left atrium, left ventricle and aorta in a single cardiac cycle.Which letter shows the point at which the semilunar valve opens?

A
B
C
D

7. Fick’s Law describes the relationship between the rate of diffusion and factors that affect this rate. This can be simplified as the equation: Rate of diffusion α (surface area × concentration gradient) / thickness of surface Inhalation of asbestos dust can cause a thickening of the alveolus wall. Which option shows the change in the rate of diffusion if the alveolus wall increases from a thickness of 2.0 μm to 2.5 μm?
Decreases by 20%
Decreases by 50%
Increases by 20%
Increases by 50%

8.Cells in the leaves of plants synthesise amino acids. Which of the statements explains why plants need a vascular system to support amino acid synthesis?
To transport amino acids to the roots using xylem tissue
To transport nitrates to the leaves using phloem tissue
To transport nitrates to the leaves using xylem tissueTo transport sucrose to the leaves using phloem tissue
To transport sucrose to the leaves using phloem tissue

9.The table shows the dimensions of a dividing ball of cells and their surface area to volume ratios.

7 : 4
3 : 2
5 : 4
1 : 1

10. The temperature coefficient (Q10) for catalase is recorded in a data book as 1.15. A student carries out an experiment to test if this Q10 value is correct and collects data with a high level of precision and accuracy. Which row shows the correct definition of both precision and accuracy for their data?
Choose the correct answer from the options below

A
B
C
D

Score =
Correct answers:

AS Level Biology Practice Test | OCR

noreply@blogger.com (Unknown) — Fri, 24 Nov 2023 14:48:00 +0000

1.The graph below shows the results of an osmosis experiment investigating the effect of changing the concentration of sodium chloride (NaCl) on mass of potatoes.

0.36 mol dm–3
0.40 mol dm–3
0.42 mol dm–3
0.62 mol dm–3

2.The reaction between carbon dioxide and water forms carbonic acid. This reaction is catalysed by the enzyme carbonic anhydrase. To catalyse this reaction, carbonic anhydrase needs a cofactor that attaches to its active site as a prosthetic group. What is the correct cofactor for carbonic anhydrase?
Ca2+
Cl –
H+
Zn2+

3.The table shows the numbers of different species of invertebrates found in four different areas in a woodland. Which row shows the area that has the greatest species richness and greatest species evenness?

A
B
C
D

4.The table shows the chemical symbols for some inorganic ions involved in biological processes. Which row gives the correct chemical symbols for all of these inorganic ions?

A
B
C
D

5. Researchers have calculated that the probability of bacterial DNA having a mutation is 1/333 in a single division.A gene has DNA that codes for amino acids and is called coding DNA. The rest of the DNA in a genome has base sequences that do not code for amino acids and is called non-coding DNA.Bacterial genome studies have shown that the average proportion of a bacterial genome that has non-coding DNA is 3/25.What is the probability of a dividing bacterium having a mutation in a gene that codes for a protein in a single division?
7351/8325
1024/8325
22/8325
1/2775

6.Restriction endonucleases are a group of enzymes that carry out hydrolysis reactions that cut long DNA molecules into shorter lengths. Which of the options describes how restriction endonucleases carry out hydrolysis reactions on a DNA molecule?
They break the glycosidic bond between a ribose and a phosphate group.
They break the hydrogen bonds between nitrogenous bases.
They break the phosphodiester bond between a deoxyribose and a phosphate group
They break the phosphodiester bond between a ribose and a phosphate group.

7. A student carried out an investigation to see the effect of changing the concentration of the enzyme maltase. They used two different maltase concentrations (concentration P and Q) to break down the disaccharide maltose for 10 minutes. The student carried out the reducing sugar test and recorded the percentage absorbance of each solution using a colorimeter. Their results are shown in the table. Which statistical test would be used to determine if there was a significant difference between the mean glucose concentration produced by maltase concentration P and maltase concentration Q?

Chi-squared test
Spearman’s rank correlation coefficient
t-test – paired
t-test – unpaired

8.International trade in parts of the rhinoceros including rhino horn has been illegal since 1977. Which organisation regulates this trade?
CBD
CITES
CSS
IUCN

9.The following passage has four key terms missing, which are names of molecules involved in protein synthesis. The enzyme .........1......... joins nucleotides together to make a copy of the gene. This makes the molecule .........2......... , which leaves through the nuclear pore to bind to an organelle that is made of protein and .........3......... . The amino acids are assembled here when .........4......... brings the specific amino acid to be joined to the polypeptide. Which row gives the correct names of these missing molecules?

A
B
C
D

10. Victoria cruziana is a tropical species of flowering plant, native to South America. Its leaves have stomata only on their upper surface and contain a large amount of aerenchyma tissue, which contains air spaces.Which group of plants does Victoria cruziana belong to?
Choose the correct answer from the options below

Epiphytes
Halophytes
Hydrophytes
Xerophytes

Score =
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