Cambridge A-level Chemistry-biochemistry-This is equivalent to two points.?

2 ⤊

Cambridge A-level Chemistry-biochemistry-This is equivalent to two points.?

State what is meant by base-pairing and indicate the nature of the chemical bonds involved.

2007-12-04 01:04:25 · 2 answers · asked by Roy S 1 in Science & Mathematics ➔ Chemistry

2 answers

This is the bonding together of two base pairs in different strands of double-stranded DNA or RNA. In particular, guanine bonds to cytidine and adenine bonds to thymine in DNA. Uracil replaces thymine in RNA, which has no thymine. The bonding is by hydrogen bonding of N-H to C=O or to N. Each pair forms either two or three such bonds as the base pairs fit snugly together.

2007-12-04 01:12:48 · answer #1 · answered by steve_geo1 7 · 2⤊ 1⤋

Yup.
Steve_geo1 has it right. Don't know who gave him the thumbs down...?

2007-12-04 01:32:53 · answer #2 · answered by gribbling 7 · 0⤊ 0⤋