Question

3.
In a DNA molecule, chymine always pairs with
A. cytosinc.
B. guanine.
C. uracil.
D. adenine.

Answer 1

Answer:  

D. adenine.

A DNA molecule consists of 4 base pairs. They are adenine, guanine, cytosine and thymine—adenine pairs with thymine using two hydrogen bonds. Thus, the correct base pairing is Adenine