numbering of carbon atoms in purines and pyrimidines is different why?what is the significance of such change in numbering?
2006-08-21 06:27:40 · 2 answers · asked by khushboo v 1 in Science & Mathematics ➔ Biology
if you look at the structure of DNA it is 3 carbon rings wide, and can only be three carbon rings wide. One has two carbon rings and the other has one, this makes base pairing complimentary. Adenine to guanine and Cytosine to Thymine all the time, if it wasn't for the different number of carbons our DNA would be really funny looking and not that cool double helix shape
2006-08-21 06:38:30 · answer #1 · answered by ucancallmejay02 2 · 1⤊ 0⤋
For the best answers, search on this site https://shorturl.im/avBvf
The simple answer is because that's how the International Union of Pure and Applied Chemists (IUPAC) decided to number them. In general, ring atoms are numbered so that the nitrogens, in this case, get the lowest possible numbers.
2016-04-06 23:43:57 · answer #2 · answered by ? 4 · 0⤊ 0⤋