Rx McQ's

503.Which of the following statement is with respect to tertiary dentin

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a.It can always be seen in routine intraoral radiographs.
b.Can be observed in demineralized histological sections
c.It is initially termed as secondary dentine
d.Starts when the lesion starts in enamel carious lesions

Ans-b.Can be observed in demineralized histological sections

502.Wallenberg syndrome is due to the complete infarction of

2011-12-29T09:24:00.000-08:00

a.Posterior inferior cerebellar artery
b.Anterior inferior cerebellar artery
c.posterior cerebral artery
d.spinal artery

Ans-a.Posterior inferior cerebellar artery

501.In Gypsum bonded investment,composition of alpha hemihydrate is

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a.60-65%
b.30-35%
c.5-10%
d.85-90%

Ans-b.30-35%
Explanation-Composition of gypsum bonded investment is
Silica-60-65%
Alpha hemihydrate-30-35%
Modifiers-5%

500.All of the following are tumour supressor genes except

2011-12-25T09:29:00.000-08:00

a.WT -1
b.PTEN
c.NF-2
d.RAS

Ans-d.RAS

499.A diamond in the shape of square based pyramid is used in

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a.Knoop hardness test
b.Vicker hardness test
c.Shore and Barcol test
d.Rock well hardness test

Ans-b.Vicker hardness test

498.Another name for infectious mononucleosis is

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a.Pfeieffer disease
b.Kissing disease
c.Both a and b
d.None

Ans-C.Both a and b Refer shafers 5th ed pg 1065

497.All of the following are radiopaque lesions except

2011-12-20T05:55:00.000-08:00

a.Ameloblastic Fibroma
b.Ameloblastic Fibroodontoma
c.Cementoblastoma
d.Odontoma

Ans-a.Ameloblastic Fibroma

496.Rain drop pigmentation of skin and mucosa is seen in

2011-12-20T05:49:00.001-08:00

a.Arsenic poisoning
b.Bismuth poisoning
c.Lead poisoning
d.Mercury poisoning

Ans-a.Arsenic poisoning

495.Most common site for the occurence of granular cell myoblastoma is

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a.Neck
b.Tongue
c.Lips
d.Gingiva

Ans-b.Tongue

494.Which of the following is not present in basal lamina

2011-12-13T06:00:00.000-08:00

a.Rhodopsin
b.Entactin
c.Laminin
d.Integrin
Ans-a.Rhodopsin Ref-Grays Anatomy 39 th ed /34-36

493.In a study in UK ,an association was found between sale of antiarryhthmic drug and an increase in death due to asthma .This is an example of

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a.Ecological study
b.Cohort study
c.Case reference study
d.Experimental study
Ans-a.Ecological study

492.Hyponatremia with increased sodium body content is seen in

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a.Diuretic administration
b.Tubular acidosis
c.Vomiting
d.Nephrotic syndrome

Ans-d.Nephrotic syndrome
Explanation-Hyponatremia with normal body sodium is almost exclusively associated with SIADH.Hyponatremia associated with increased total body sodium results from water retention in excess of sodium retention.The four clinical states where in this phenomenon is seen are congestive heart failure,cirrhosis,nephrotic syndrome and advanced renal failure.

491.Most common site for CSF Rhinorrhea

2011-12-08T09:22:00.001-08:00

a.Ethmoidal sinus
b.Frontal sinus
c.Petrous bone
d.Cribriform plate

Ans-d.Cribriform plate

The Cribriform plate and air cells of the ethmoid sinus account for the maximum no of leaks

490.Which of the following enzymes is purely mitochondrial

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a.SGOT
b.SGPT
c.Gamma Glutamyl Transferase
d.5 Nucleotidase

Ans-a.SGOT
Explanation-SGOT has two isoenzymes
Inside the liver SGOT is localized mainly in the mitochondria with the remainder in the cytoplasm.

489.Which of the following syndrome is characterized by multiple large 'cold staphylococcal abscesses?

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    1.Job's syndrome
    2.Lazy leukocyte syndrome.
3.Chediak-higashi syndrome.
   4.Wiskott Aldrich syndrome.
ANS- Job's syndrome
Reference : - Ananthnarayan-157

488.The occurrence of hyperthyroidism following administration of supplemental iodine to subjects with endemic iodine deficiency goitre is known as:

2011-11-28T09:11:00.001-08:00

1.Jod-Basedow effect
2.Wolff-Chaikoff effect
3.Thyrotoxicosis factitia
4.De Quervain's thyroiditis

Ans-1. Jod-Basedow effect

Reference : - > Harrison-(15)-2077

487.After doing proper etching ,what is the ideal depth of the microtags formed.

2011-11-25T06:48:00.001-08:00

a.0.5-5micrometres
b.5-50 micrometres
c.50-500 micrometres
d.500-5000 micrometres

Ans-b.5-50 micrometres

486.When estimating working length using paralleling technique radiograph,how much enlargement of image is allowed

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a.1mm
b.2mm
c.3mm
d.None

Ans-b.2mm

485. Thiamine deficiency causes decreased energy production because

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a) It is required for the process of transamination.
b) It is co-factor in oxidative reduction .
c)It is co-enzyme for transketolase in pentose phosphate pathway .
d) It is co-enzyme for pyruvate dehydrogenase.

Ans-d) It is co-enzyme for pyruvate dehydrogenase.

484. Reactive arthritis is caused by

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a) Staph. aureus
b) H. influenza
c) N. gonnorhea
d) E.coli

Ans-c) N. gonnorhea

483. which drug does not metabolize by acetylation:

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a)Isoniazid
b)Metaclopromide
c)Procainamide
d)Dapsone

Ans-b.Metoclopramide

482.Which of the following is a derivative of the second pharyngeal arch?

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A. Eustachian tube
B. External auditory meatus
C. Palatine tonsil
D. Stylohyoid muscle
The correct answer is D. The stylohyoid is derived from the second pharyngeal arch, which also
gives rise to the muscles of facial expression, the stapedius, the posterior belly of the digastric
muscle, Reichert's cartilage, and the facial nerve.

481.During a cranial nerve test, the patient cannot elevate her right eye from the abducted position. Which of the following muscles is paralyzed?

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A. Right inferior oblique
B. Right inferior rectus
C. Right lateral rectus
D. Right superior oblique
E. Right superior rectus
The correct answer is E. The superior rectus muscle can elevate and adduct the eye from the
neutral position. From the abducted position, it is the only muscle that can elevate the eye.
The inferior oblique muscle (choice A) can elevate and abduct the eye from the neutral position.
From the adducted position, it is the only muscle that can elevate the eye.
The inferior rectus muscle (choice B) can depress and adduct the eye from the neutral position. From
the abducted position, it is the only muscle that can depress the eye.
The lateral rectus muscle (choice C) can abduct the eye.
The superior oblique muscle (choice D) can depress and abduct the eye from the neutral position.
From the adducted position, it is the only muscle that can depress the eye

480.Hirschsprung's disease indicates a developmental abnormality in which of the following embryonic tissues?

2011-11-17T08:53:00.001-08:00

A. Ectoderm
B. Endoderm
C. Neural crest
D. Neural ectoderm

Ans-c.Neural crest

The baby has Hirschsprung's disease, which is due to an absence of
ganglion cells in the wall of the colon. Neural crest cells contribute to the formation of many adult
structures. Among these are all of the postganglionic neurons of the autonomic nervous system and
the sensory neurons of the peripheral nervous system.

479.At which of the following ages does fetal movement first occur?

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A. 1 month
B. 2 months
C. 4 months
D. 6 months

Ans-B.2months
Neuromuscular development is sufficient to allow fetal movement in the
eighth week of life. Other features of Week 8 include the first appearance of a thin skin, a head as
large as the rest of the body, forward-looking eyes, appearance of digits on the hands and feet,
appearance of testes and ovaries (but not distinguishable external genitalia), and a crown-rump length
of approximately 30 mm. By the end of the eighth week, nearly all adult structures have at least begun
to develop, and the fetus "looks like a baby.