Q. 8 - Biology

Question

Which of the following events does not occur during some stages of interphase?

a. DNA duplication

b. organelle duplication

c. increase in cell size

d. separation of sister chromatids 

Step-by-Step Solution

Answer

The correct answer is (d) separation of sister chromatids . 

Step 1. Introduction

Interphase is a portion of cell cycle in which cell obtains nutrients and metabolizes them. During this phase the cell grows. It comprises of $G_{1,}$ $G_2$ and S phase.

Step 2. Events in interphase

There are three stages of interphase: G1 (first gap), S (synthesis of new DNA ), and G2 (second gap). The S phase is a period of the cell cycle during which DNA is replicated (or synthesized). G1 and G2 are both growth phases, during which cellular organelles are replicated and the cell grows in size. 

Step 3. Separation of sister chromatids

During anaphase, sister chromatids separate and move to the spindle poles.