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Chapter 10: Q. 11 (page 276)

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

Short Answer

Expert verified

The correct option is D.

Step by step solution

01

Step. 1 Introduction

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

02

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.

03

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.

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Most popular questions from this chapter

Attachment of the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis?

a. prophase

b. prometaphase

c. metaphase

d. anaphase

A gene that codes for a positive cell-cycle regulator is called a(n) _____.

a. kinase inhibitor.

b. tumor suppressor gene.

c. proto-oncogene.

d. oncogene.

Which eukaryotic cell-cycle event is missing in binary fission?

a. cell growth

b. DNA duplication

c. karyokinesis

d. cytokinesis

What is the main prerequisite for clearance at the G2 checkpoint?

a. cell has reached a sufficient size

b. an adequate stockpile of nucleotides

c. accurate and complete DNA replication

d. proper attachment of mitotic spindle fibres to kinetochores

Describe the general conditions that must be met at each of the three main cell-cycle checkpoints.
See all solutions

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