Question 1

Which of the following best explains why cell division is essential for multicellular organisms?

Accepted Answer

It is required for the maintenance, growth, and repair of tissues.

Question 2

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 3

A scientist observes a cell with chromosomes aligned at the metaphase plate. Which phase of mitosis is this cell in?

Accepted Answer

Metaphase

Question 4

Which structure is responsible for attaching spindle microtubules to chromosomes during mitosis?

Accepted Answer

Kinetochore

Question 5

If a cell has 8 chromosomes during G1 phase, how many sister chromatids will be present after S phase?

Accepted Answer

$$16$$

Question 6

Which of the following events occurs during anaphase of mitosis?

Accepted Answer

Sister chromatids separate and move toward opposite poles.

Question 7

What is the main difference between cytokinesis in plant cells and animal cells?

Accepted Answer

Plant cells form a cell plate, while animal cells form a cleavage furrow.

Question 8

Which checkpoint in the cell cycle is most critical for determining whether a cell will divide?

Accepted Answer

G1 checkpoint

Question 9

Cancer cells differ from normal cells in that they:

Accepted Answer

Do not respond to cell cycle regulatory signals.

Question 10

Which of the following best describes the process of binary fission in prokaryotes?

Accepted Answer

The chromosome replicates and the cell divides into two genetically identical cells.

Question 11

A cell is observed to have a single, unduplicated chromosome. Which phase of the cell cycle is it most likely in?

Accepted Answer

G1 phase

Question 12

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

Accepted Answer

Production of gametes

Question 13

What would happen if the cohesins holding sister chromatids together were not cleaved during mitosis?

Accepted Answer

Sister chromatids would not separate during anaphase.

Question 14

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

Accepted Answer

Chromosome duplication occurs during S phase.

Question 15

A patient is treated with a chemotherapeutic drug that inhibits microtubule depolymerization. What is the most likely effect on mitosis?

Accepted Answer

Sister chromatids will not separate during anaphase.

Question 16

Which of the following best describes the role of motor proteins during anaphase?

Accepted Answer

They walk chromosomes along microtubules toward spindle poles.

Question 17

If a mutation prevents the formation of kinetochores, what would be the most direct consequence during mitosis?

Accepted Answer

Spindle microtubules could not attach to chromosomes.

Question 18

Which of the following is a key difference between mitosis and meiosis?

Accepted Answer

Mitosis produces genetically identical cells, while meiosis produces genetically diverse cells.

Question 19

A cell is exposed to a signal that causes it to exit the cell cycle and enter a nondividing state. Which phase does the cell enter?

Accepted Answer

G0 phase

Question 20

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

Accepted Answer

They do not require growth factors to divide and ignore cell cycle checkpoints.

Cell Division and the Eukaryotic Cell Cycle: Structure, Function, and Regulation

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