Nucleic Acids DNA is the single most important molecule embed within cells. It is a stable polynucleotide, which contains coded information for inherited characteristics. It is contained in chromosomes in the nucleus of an eukaryot cell. The essential features of the Watson-Crick model argon summarised below. 1. The ii helical polynucleotide chains are coiled around a common axis. The two chains have opposite pencil lead sign i.e. they are antiparrallel. 2. The regular repeating sugar phosphate binding of each strand lies on the outside of the helix. The purine and pyrimidine baseborns get word in at 900 to the axis of the helix. 3.
The two strands are held unneu rotic by hydrogen bonding between pairs of bases such that gee everlastingly pairs with cytosine and adenine always pairs with thymine; this is called complemental base pairing 3. The diameter of the helix is 2.0 nm and bordering bases are separated by 0.34 nm and inclined at 360 sexual congress to each other. This means that each co...If you extremity to get a full essay, order it on our website:
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