Control of specific steps in the cell cycle can be studied in cell culture by the use of cell fusion experiments. If cells that are currently in S-phase of the cell cycle are fused with cells that are in the G₁-phase of the cell cycle, which of the following would most correctly reflect the process of DNA synthesis? A) it is induced in the G₁-phase nucleus B) it is inhibited in the S-phase nucleus C) it is stimulated in the S-phase nucleus D) it is unaffected in the G₁-phase nucleus

Question

Quizplus · Accepted Answer

The S-phase nucleus contains factors that can induce DNA synthesis, so when fused with a G1-phase nucleus, these factors can trigger the G1 nucleus to begin DNA synthesis.

Control of Specific Steps in the Cell Cycle Can Be