Question 1

Which of the following best describes the primary purpose of cell division in multicellular organisms?

Accepted Answer

To enable growth, repair, and maintenance by producing genetically identical daughter cells

Question 2

A human somatic cell contains 46 chromosomes. After mitosis and cytokinesis, how many chromosomes will each daughter cell contain?

Accepted Answer

46

Question 3

During which phase of the cell cycle does the cell spend the majority of its time, and what is the main activity during this phase?

Accepted Answer

Interphase; cell growth and DNA replication

Question 4

Which of the following correctly matches a mitotic stage with its defining event?

Accepted Answer

Anaphase: sister chromatids are pulled apart toward opposite poles

Question 5

If a mutation prevents the formation of the cleavage furrow during cytokinesis in an animal cell, what is the most likely result?

Accepted Answer

The cell will become multinucleated, containing two nuclei in one cytoplasm

Question 6

Which structure is responsible for attaching to chromosomes and moving them during mitosis?

Accepted Answer

Mitotic spindle

Question 7

In plant cells, cytokinesis is accomplished by the formation of which structure?

Accepted Answer

Cell plate

Question 8

A scientist observes a cell with chromosomes aligned at the center of the cell, attached to spindle fibers from opposite poles. Which phase is the cell in?

Accepted Answer

Metaphase

Question 9

Which of the following best explains why cancer cells divide uncontrollably?

Accepted Answer

They bypass normal cell cycle checkpoints that regulate division

Question 10

If a human cell in G2 phase is observed, how many chromatids will it contain?

Accepted Answer

92

Question 11

Which of the following events occurs during prophase of mitosis?

Accepted Answer

Chromosomes condense and spindle apparatus begins to form

Question 12

A researcher treats dividing cells with a drug that prevents the formation of kinetochores. What is the most likely effect on mitosis?

Accepted Answer

Spindle fibers will not attach to chromosomes, preventing proper segregation

Question 13

Which of the following equations correctly represents the chromosome number in human somatic cells after mitosis?

Accepted Answer

$$2n \rightarrow 2n$$

Question 14

During which stage of mitosis do the nuclear envelope reforms and chromosomes decondense?

Accepted Answer

Telophase

Question 15

Which of the following best describes the difference between cytokinesis in animal and plant cells?

Accepted Answer

Animal cells form a cleavage furrow, while plant cells form a cell plate

Question 16

A cell is observed to have chromosomes that are attached to spindle fibers but not yet separated. Which checkpoint must be passed before the cell can proceed to anaphase?

Accepted Answer

M (spindle) checkpoint

Question 17

If a mutation causes a cell to skip the G1 phase, which of the following is the most likely consequence?

Accepted Answer

The cell may not grow properly before DNA replication, leading to smaller daughter cells

Question 18

Which of the following best describes the role of the metaphase plate during mitosis?

Accepted Answer

It is the region where chromosomes align before being separated

Question 19

A patient is diagnosed with a tumor in which cells have abnormally high rates of mitosis. Which of the following is a likely explanation for this observation?

Accepted Answer

The cells have lost control of cell cycle checkpoints

Question 20

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

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Cell Division and the Cell Cycle: Study Notes (Ch. 12)

Study Guide - Practice Questions

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