3 coils of the DNA double helix, consisting of nucleic acids, to demonstrate base pairing. At the top end is attached one RNA cord, to show the basis of transcription.
Coloured units (representing phosphoric acids, purines and pyrimidines) for constructing DNA, t-RNA and RNA helices. Also useful for explaining replication and transcription.
Biologia 
pronto per spedizione in 24h solo stock ++ garanzia di prezzi ++ 30 giorni diritto di recesso ++ 
