Which of the following is correct state H-bonding in nucleotide ?

Options

A. A-T,G-C
B. A-G,T-C
C. G-T,A-C
D. A-A,T-T

Answer

A

Explanation

The structure of DNA molecules is a double helical structure . In this structure double helix are made up of two right handed helical polynucleotide chains which are held together by H-bonds. In these helixes the adenine (A) base is linked with thymine (T) by two H-bonds and guanine (G) is linked with cytocine (C) by three H-bonds are A=T, and G=C