Thymine is used in DNA despite the fact that it is energetically more expensive to synthesize than uracil because
A)spontaneous deamination reactions convert cytosine to uracil at a fairly high rate.
B)uracil is more sensitive to ultraviolet (UV)damage.
C)uracil is more susceptible to depurination.
D)uracil can only bind with ribose,not deoxyribose.
E)thymine is less likely to undergo spontaneous deamination than uracil.

Question

Quizplus · Accepted Answer

Spontaneous deamination of cytosine can lead to uracil, which if not corrected, can cause mutations. Using thymine in DNA instead of uracil allows cells to recognize and repair these deaminated cytosines, thus maintaining genetic stability.

Thymine Is Used in DNA Despite the Fact That It