Question 1

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

Accepted Answer

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

Question 2

During which phase of mitosis do chromosomes align at the center of the cell, known as the metaphase plate?

Accepted Answer

Metaphase

Question 3

What is the role of the contractile ring during cytokinesis in animal cells?

Accepted Answer

It pinches the cell membrane to form two separate cells.

Question 4

Which checkpoint in the cell cycle determines whether a cell will proceed to DNA synthesis or enter a nondividing state?

Accepted Answer

G1 checkpoint

Question 5

A researcher observes that cells in a tissue culture stop dividing when they become crowded. This phenomenon is best explained by:

Accepted Answer

Density-dependent inhibition

Question 6

Which of the following is NOT a function of the mitotic spindle during mitosis?

Accepted Answer

Synthesizing new DNA

Question 7

Stem cells are unique because they:

Accepted Answer

Can divide and differentiate into various cell types

Question 8

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

Accepted Answer

The cell will not complete cytokinesis, resulting in one cell with two nuclei.

Question 9

Which of the following best describes the function of growth factors in the cell cycle?

Accepted Answer

They stimulate cell division by signaling the cell cycle control system.

Question 10

A plant cell is observed forming a structure in the middle of the cell during cytokinesis. This structure is most likely:

Accepted Answer

A cell plate

Question 11

Which of the following events occurs during anaphase of mitosis?

Accepted Answer

Sister chromatids are pulled apart toward opposite poles.

Question 12

What would happen if the G2 checkpoint failed to detect DNA damage before mitosis?

Accepted Answer

Damaged DNA could be passed to daughter cells.

Question 13

Which of the following equations best represents the relationship between the number of chromosomes before and after mitosis in a diploid cell?

Accepted Answer

$$2n \rightarrow 2n$$

Question 14

A scientist observes that a certain cell type can no longer become another type of cell after a specific stage. This process is called:

Accepted Answer

Differentiation

Question 15

Which of the following is a correct sequence of events during mitosis?

Accepted Answer

Prophase → Metaphase → Anaphase → Telophase

Question 16

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

Accepted Answer

They ignore cell cycle checkpoints and signals.

Question 17

In a laboratory experiment, cells are grown in a dish without a solid surface. Most cells fail to divide. This is an example of:

Accepted Answer

Anchorage dependence

Question 18

Which of the following statements about the cell cycle control system is correct?

Accepted Answer

It is a set of molecules that triggers and coordinates key events in the cell cycle.

Question 19

If a plant cell is unable to form vesicles containing cell wall material during cytokinesis, what is the most likely result?

Accepted Answer

The cell will not complete cytokinesis, resulting in one cell with two nuclei.

Question 20

Which of the following best describes the fate of a cell that does not receive a 'go-ahead' signal at the G1 checkpoint?

Accepted Answer

It enters a nondividing G0 phase.

Cell Division: Mitosis, Cytokinesis, and Cell Cycle Regulation

Study Guide - Practice Questions