Knowledge of the cell cycle has led to improved means of treating cancer.The drug 5-fluorouracil,which blocks the synthesis of the nucleic acid thymine,inhibits initiation of the cell cycle stage
A) G1.
B) G2.
C) S.
D) prophase.
E) metaphase.

Question

Quizplus · Accepted Answer

The drug 5-fluorouracil blocks the synthesis of nucleic acid thymine which is a crucial building block of DNA, thereby inhibiting DNA synthesis during the S phase of the cell cycle. Therefore, the best choice is option C.

Knowledge of the Cell Cycle Has Led to Improved Means