AP BIOLOGY

LABORATORY REVIEW

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What replaces thymine in the RNA?
A
adenine
B
uracil
C
guanine
D
cytosine
Explanation: 

Detailed explanation-1: -DNA (top) includes thymine (red); in RNA (bottom), thymine is replaced with uracil (yellow).

Detailed explanation-2: -Uracil (U) is one of the four nucleotide bases in RNA, with the other three being adenine (A), cytosine (C) and guanine (G). In RNA, uracil pairs with adenine. In a DNA molecule, the nucleotide thymine (T) is used in place of uracil.

Detailed explanation-3: -In RNA instead of thymine, uracil is present.

There is 1 question to complete.