K'NEX RSS Feeds - Secondary School: Biology; Life Sciences Sitemap http://www.knex.com Copyright 2013. All Rights Reserved DNA, Replication and Transcription The K NEX DNA Replication and Transcription set is designed to aid in teaching the structure and function of the nucleic acid molecules that make up DNA deoxyribonucleic acids and RNA ribonucleic acids . Excellent demonstration tool at the elementary scho... http://www.knex.com/Educators/dna_replication_transcription.php