Question

Unlike DNA, RNA contains

Select one:
a. uracil.
b. adenine.
c. thymine.
d. phosphate groups.

Answer 1

RNA contains uracil instead of thymine.

Step-by-step explanation:

RNA contains the nitrogenous base uracil instead of thymine. Uracil pairs with adenine in RNA, just as thymine pairs with adenine in DNA. Uracil and thymine have very similar structures; uracil is an unmethylated form of thymine.