A wonderfully flexible set that allows students to build and learn about phosphate groups, deoxyribose and ribose sugars, hydrogen bonds, codons, nucleotides, mRNA and much more. Seven different models can be built, four at a time, from pieces that easily snap together and unsnap to show replication and transcription. Includes 521 K’NEX pieces and 20-page instruction booklet, packed in strong, stackable storage case. Teacher’s guide with lesson plans and extension activities on CD-ROM are also included.
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