Nucleic Acids DNA is the single most important molecule engraft 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 star 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 project in at 900 to the axis of the helix. 3.
The two strands are held together by hydrogen bonding between pairs of bases such that guanine everlastingly pairs with cytosine and adenine always pairs with thymine; this is called complementary base pairing 3. The diameter of the helix is 2.0 nm and adjacent bases are separated by 0.34 nm and inclined at 360 sexual congress to each other. This means that each co...If you want to get a full essay, order it on our website:
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