31) If a cell contains 20 chromosomes, how many chromatids : 1380773

31) If a cell contains 20 chromosomes, how many chromatids : 1380773.



31) If a cell contains 20 chromosomes, how many chromatids will be present during prophase?

A) 30

B) 20

C) 5

D) 40


32) Some anticancer chemotherapy agents interfere with the proper functioning of microtubules. How do these anticancer chemotherapy agents work?

A) They inhibit the mitotic spindle and prevent cell division.

B) They inhibit the contractile ring and prevent cell division.

C) They inhibit telophase because microtubules are required to form nuclear envelopes.

D) Microtubules replicate DNA, so they inhibit chromosome duplication.


33) During metaphase, chromosomes that are attached to microtubules are observed to undergo a “back-and-forth” movement. What is happening during this movement?

A) The chromosomes are being replicated.

B) The centrosome is being replicated.

C) The chromosomes are being aligned at the equator of the cell.

D) The chromosomes are breaking up the nuclear membrane.


34) What event typically begins in anaphase and is completed soon after the end of telophase?

A) interphase

B) alignment of chromosomes at the cell equator

C) packing of DNA into well-defined chromosomes

D) cytokinesis


35) Microtubule-organizing centers will begin to migrate toward the cell poles during:

A) prophase.

B) metaphase.

C) anaphase.

D) telophase.

36) What would be the result of an error in anaphase that failed to separate a pair of sister chromatids?

A) The nuclear envelope would not be able to break down.

B) One cell would have an extra gene, and one cell would be missing one gene.

C) One cell would have an extra chromosome, and one cell would lack a chromosome.

D) Cytokinesis would not be able to take place, and the cells would not divide.


37) Chromosomes are aligned at the equator of a cell during:

A) prophase.

B) metaphase.

C) anaphase.

D) telophase.


38) Which of the following structures is involved in forming a cleavage furrow?

A) sister chromatids

B) mitotic spindle

C) metaphase plate

D) contractile ring

39) The chromosomes become visible and the nucleus starts to break up during:

A) prophase.

B) metaphase.

C) anaphase.

D) telophase.


40) Which statement is true of mitosis and cytokinesis in normal tissues?

A) Cytokinesis partially overlaps with mitosis.

B) Cytokinesis occurs simultaneously with mitosis.

C) Mitosis precedes cytokinesis.

D) Cytokinesis precedes mitosis.


31) If a cell contains 20 chromosomes, how many chromatids : 1380773

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