Question 1

Which of the following statements best describes the difference between mitosis and meiosis in terms of genetic outcome?

Accepted Answer

Mitosis produces genetically identical daughter cells, while meiosis produces genetically unique daughter cells.

Question 2

During which phase of the cell cycle is DNA replicated?

Accepted Answer

S phase

Question 3

What is the primary function of the mitotic spindle during mitosis?

Accepted Answer

To separate sister chromatids and move them to opposite poles of the cell

Question 4

Which checkpoint in the cell cycle is considered the most important for committing a cell to division?

Accepted Answer

G1 checkpoint

Question 5

A researcher observes that a cell continues to divide even when crowded and detached from its substrate. What does this suggest about the cell?

Accepted Answer

The cell is likely a cancer cell that has lost density-dependent inhibition and anchorage dependence.

Question 6

In animal cells, cytokinesis is accomplished by the formation of a cleavage furrow. In plant cells, what structure is formed during cytokinesis?

Accepted Answer

Cell plate

Question 7

Which of the following equations correctly represents the chromosome number change during meiosis in humans?

Accepted Answer

$2n \rightarrow n$

Question 8

A cell is observed to have condensed chromosomes aligned at the metaphase plate. Which phase of mitosis is this cell in?

Accepted Answer

Metaphase

Question 9

Which of the following best explains why cancer cells can form tumors?

Accepted Answer

They ignore cell cycle checkpoints and continue dividing uncontrollably.

Question 10

In prokaryotic cell division, which process is responsible for the separation of replicated chromosomes?

Accepted Answer

Binary fission

Question 11

A cell is exposed to a drug that inhibits microtubule polymerization. Which stage of mitosis would be most directly affected?

Accepted Answer

Prophase, because spindle formation would be impaired

Question 12

Which of the following is a real-world example of a cell entering the G0 phase?

Accepted Answer

A mature neuron in the human brain that no longer divides

Question 13

Which molecular event marks the transition from G2 phase to M phase in the cell cycle?

Accepted Answer

Activation of cyclin-dependent kinases (CDKs)

Question 14

A cell with 46 chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after cytokinesis?

Accepted Answer

$46$

Question 15

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

Accepted Answer

Kinetochores attach chromosomes to spindle microtubules, facilitating their movement during cell division.

Question 16

Which of the following is NOT a function of cell division in multicellular organisms?

Accepted Answer

Reproduction of unicellular organisms

Question 17

A patient’s tumor is found to invade surrounding tissues and spread to other organs. What term best describes this tumor?

Accepted Answer

Malignant

Question 18

Which of the following external signals can stimulate a cell to divide?

Accepted Answer

Growth factors

Question 19

If a cell fails the G2 checkpoint, which of the following is most likely to occur?

Accepted Answer

The cell will not proceed to mitosis until DNA is repaired or conditions are met.

Question 20

Which of the following best explains why the cell cycle is compared to a washing machine with a timing device?

Accepted Answer

The cell cycle has specific checkpoints that regulate progression, similar to timed stages in a washing machine.

The Cell Cycle and Mitosis: Structure, Regulation, and Division in Cells

Study Guide - Practice Questions