Q. 11 - Biology

Question

Unpacking of chromosomes and the formation of a new nuclear envelope is a characteristic of which stage of mitosis? 

a. prometaphase 

b. metaphase 

c. anaphase 

d. telophase 

Step-by-Step Solution

Answer

The correct option is D.

Step. 1 Introduction

At mitosis, an eukaryotic cell divides to become two genetically similar daughter cells by a precisely synchronized nuclear division.

Step. 2 Explanation for correct option.

During telophase, chromosomes appear at opposing poles, and each pair of chromosomes is surrounded by fresh nuclear envelope material.

Step. 3 Explanation for incorrect option

Option a. Kinetochores occur at the centromeres during prometaphase, and microtubules bind to kinetochores.

Option b. During metaphase, chromosomes align and sister chromatid becomes connected to a spindle fibre.

Option c. Chromosomes get driven toward opposing poles during anaphase.