Cells are treated with a drug that blocks purine synthesis. Which bases would not be made in those treated cells?
A) cytosine, thymine, and uracil
B) adenine and guanine
C) adenine and thymine
D) cytosine and guanine

Question

Quizplus · Accepted Answer

Purine synthesis is necessary for the production of adenine and guanine, so if this pathway is blocked, these bases would not be made. The other answer options are incorrect because they either include bases that are not dependent on purine synthesis (cytosine and thymine) or exclude bases that are dependent on purine synthesis (adenine and/or guanine).

Cells Are Treated with a Drug That Blocks Purine Synthesis