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Chapter 10: Q. 10 (page 276)

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

Short Answer

Expert verified

The correct option is B.

Step by step solution

01

Step. 1 Introduction

The mitotic spindle fiber seems to be a structure that arises following cell division and thus is responsible for separating identical chromosomes.

02

Step. 2 Explanation for correct option

Kinetochores form at the centromeres during prometaphase, as well as mitotic spindle microfilaments bind onto kinetochores.

03

Step. 3 Explanation for incorrect option

Option a. The nucleolus dissolves during prophase, and the chromosomes condense by becoming visible.

Option c. During metaphase, chromosomes align as well as each sister chromatid is connected to a spindle fibre.

Option d. Sister chromatids become drawn towards opposing poles during anaphase.

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Most popular questions from this chapter

Describe how the duplicated bacterial chromosomes are distributed into new daughter cells without the direction of the mitotic spindle.

Which negative regulatory molecule can trigger cell suicide (apoptosis) if vital cell cycle events do not occur?

a. p53

b. p21

c. retinoblastoma protein (Rb)

d. cyclin-dependent kinase (Cdk)

Figure 10.14 Human papillomavirus can cause cervical cancer. The virus encodes E6, a protein that binds p53. Based on this fact and what you know about p53, what effect do you think E6 binding has on p53 activity? a. E6 activates p53 b. E6 inactivates p53 c. E6 mutates p53 d. E6 binding marks p53 for degradation

At which of the cell-cycle checkpoints do external forces have the greatest influence?

a. G1 checkpoint

b. G2 checkpoint

c. M checkpoint

d. G0 checkpoint

The first level of DNA organization in a eukaryotic cell is maintained by which molecule?

a. cohesin

b. condensin

c. chromatin

d. histone
See all solutions

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