$$DNA_{G2} = 2 \times DNA_{G1}$$

Question 1

Which stage of the cell cycle is characterized by relaxed, unreplicated chromatin and active cell growth?

Accepted Answer

G1 phase

Question 2

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

Accepted Answer

Anaphase

Question 3

A drug that disrupts microtubule formation would most directly affect which process during cell division?

Accepted Answer

Formation of the mitotic spindle

Question 4

If a cell bypasses the G1 checkpoint despite DNA damage, what is a likely consequence?

Accepted Answer

The cell may accumulate mutations and become cancerous

Question 5

Which equation best represents the change in DNA content during the cell cycle, as shown in the graph?

Accepted Answer

$$DNA_{G2} = 2 	imes DNA_{G1}$$

Question 6

Which structure is responsible for separating chromosomes 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

Which checkpoint ensures that all chromosomes are properly attached to the spindle before proceeding to anaphase?

Accepted Answer

M checkpoint

Question 9

What would be the result if a cell underwent repeated rounds of the cell cycle without cytokinesis?

Accepted Answer

Large cells containing many nuclei

Question 10

Which phase of the cell cycle is most likely to be lengthened if a cell needs more time to repair DNA damage before division?

Accepted Answer

G2 phase

Question 11

Which of the following best describes the chromatin state during prophase of mitosis?

Accepted Answer

Condensed and replicated

Question 12

A cell that does not receive a go-ahead signal at the G1 checkpoint will most likely:

Accepted Answer

Exit the cell cycle and enter G0

Question 13

Which of the following is a major difference between animal and plant cell cytokinesis?

Accepted Answer

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

Question 14

Which of the following correctly matches a phase of the cell cycle with its description?

Accepted Answer

G1: follows cell division

Question 15

Cytochalasin B is a chemical that disrupts actin cytoskeleton formation. This chemical would interfere with:

Accepted Answer

Cleavage furrow formation

Question 16

If a drug blocks DNA replication during S phase, what would be the effect on the cell cycle?

Accepted Answer

The cell would not progress past the G2 checkpoint

Question 17

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

Accepted Answer

Reduction of chromosome number in somatic cells

Question 18

Which of the following best explains why cells get smaller with each division during early embryonic development?

Accepted Answer

Cells divide rapidly without growing between divisions

Question 19

Which of the following is true about the molecular control system of the eukaryotic cell cycle?

Accepted Answer

The frequency of cell division varies with cell type due to regulation at the molecular level

Question 20

Which of the following would most likely result from ignoring the M checkpoint during cell division?

Accepted Answer

Unequal distribution of chromosomes to daughter cells

The Cell Cycle and Cell Division: Structure, Regulation, and Diversity

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