Question

How many nitrogenous bases are present in one pitch of B-DNA?
A) 10
B) 20
C) 40
D) 80​

Answer 1

Answer:

10

Explanation:

The bases are nearly perpendicular to the helix axis, and adjacent bases are separated by 3.4 . The helical structure repeats every 34 , so there are 10 bases (= 34 per repeat/3.4 per base) per turn of helix.

Answer 2

Answer:

10 PAIRS MEANS 20 NITROGENOUS BASES

Explanation: