Read the following statement and find out the incorrect statement .

Options

A. A and G of one strand compulsorily base pairs with C and T ,respectively on the other strand
B. There are two hydrogen bonds between A and T and three hydrogen bonds between G and C.
C. At each step of ascent the strand turns `36^(@)`
D. The pitch of B-DNA is 3.4 nm

Answer

A

Explanation

(A) A and G of one strand compulsorily abse pairs with T and C, respectively on the other strand.
There are two hydrogen bonds between A and T and three hydrogen bonds between G and C.
AT each step of ascent the strand turns `36^(@)`.
Ths pitch of B-DNA is 3.4 nm (or 34Å)