Question 1

During which phase of mitosis do sister chromatids separate and move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 2

What is the primary event that occurs during metaphase in mitosis?

Accepted Answer

Chromosomes align at the equator of the cell

Question 3

A researcher observes a cell with chromosomes lined up in the middle of the cell, spindle fibers attached to centromeres, and no nuclear envelope. Which phase is the cell in?

Accepted Answer

Metaphase

Question 4

Which structure is responsible for pulling sister chromatids apart during anaphase?

Accepted Answer

Spindle fibers

Question 5

If a cell fails to form spindle fibers during mitosis, which process will be directly affected?

Accepted Answer

Alignment of chromosomes at the equator

Question 6

Which phase of mitosis is characterized by the reformation of the nuclear envelope and the decondensation of chromosomes?

Accepted Answer

Telophase

Question 7

A cell is observed to have two distinct nuclei forming at opposite poles, and chromosomes are decondensing. What is the next process that will occur?

Accepted Answer

Cytokinesis

Question 8

Which of the following best describes the role of the centromere during mitosis?

Accepted Answer

It holds sister chromatids together until anaphase

Question 9

During which phase of mitosis do chromosomes first become visible as distinct structures under a microscope?

Accepted Answer

Prophase

Question 10

A mutation prevents the nuclear envelope from breaking down during mitosis. Which phase would be most directly affected?

Accepted Answer

Prophase

Question 11

If a cell completes mitosis but fails to undergo cytokinesis, what will be the result?

Accepted Answer

A single cell with two nuclei

Question 12

Which equation best represents the number of chromosomes in daughter cells after mitosis, if the parent cell has $$2n$$ chromosomes?

Accepted Answer

$$2n$$

Question 13

A cell in metaphase is exposed to a drug that prevents spindle fibers from attaching to centromeres. What is the most likely outcome?

Accepted Answer

Sister chromatids will not separate during anaphase

Question 14

Which of the following is the correct sequence of mitosis phases?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Question 15

A patient’s cells are observed to have chromosomes that do not separate properly during anaphase. Which condition could result from this error?

Accepted Answer

Aneuploidy

Question 16

Which phase of mitosis ensures that each new cell will have an identical set of chromosomes?

Accepted Answer

Anaphase

Question 17

During telophase, which of the following events occurs?

Accepted Answer

Nuclear envelopes reform around chromosomes

Question 18

A scientist stains cells to observe mitosis. Which phase will show chromosomes as thick, condensed structures moving toward opposite poles?

Accepted Answer

Anaphase

Question 19

Which process immediately follows telophase in the cell cycle?

Accepted Answer

Cytokinesis

Question 20

If a cell starts mitosis with 46 chromosomes, how many chromosomes will each daughter cell have after cytokinesis?

Accepted Answer

$$46$$

Cell Division: Mitosis – Stages and Key Processes

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