Question

there are ______ hydrogen bonds between cytosine and guanine.

a 2

b 3

c 1

d 4

Explanation:

In DNA base pairing, cytosine (C) pairs with guanine (G) via hydrogen bonds. Specifically, cytosine and guanine form 3 hydrogen bonds between them, while adenine (A) and thymine (T) form 2.

Answer:

b. 3