Question 1

Which of the following best describes the main purpose of mitosis in multicellular organisms?

Accepted Answer

To ensure the faithful transmission of genetic information to daughter cells

Question 2

During which phase of the cell cycle does DNA replication occur, resulting in the doubling of DNA content in the nucleus?

Accepted Answer

S phase

Question 3

A scientist observes a cell with condensed chromosomes aligned at the center of the cell. Which stage of mitosis is this cell most likely in?

Accepted Answer

Metaphase

Question 4

If a cell fails to properly complete cytokinesis after mitosis, what is the most likely outcome?

Accepted Answer

The cell will have two nuclei within a single cytoplasm

Question 5

Which of the following equations correctly represents the change in DNA content during the S phase of the cell cycle?

Accepted Answer

$2N \rightarrow 4N$

Question 6

A mutation causes a cell to skip the G$_1$ phase and enter S phase prematurely. Which of the following is a likely consequence?

Accepted Answer

The cell may not have sufficient resources or size to support DNA replication

Question 7

Which process ensures the equal partitioning of chromosomal material into the nuclei of two daughter cells during mitosis?

Accepted Answer

Karyokinesis

Question 8

Cells in the liver can remain in a non-dividing, differentiated state for years. Which phase of the cell cycle are these cells most likely in?

Accepted Answer

G$_0$ phase

Question 9

Which of the following best describes the role of the spindle fibers during mitosis?

Accepted Answer

They attach to kinetochores and help separate sister chromatids

Question 10

A patient is diagnosed with a tumor characterized by uncontrolled cell division. Which cell cycle process is most likely disrupted?

Accepted Answer

Regulation of the cell cycle checkpoints

Question 11

Which of the following is NOT a substage of mitosis?

Accepted Answer

Interphase

Question 12

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

Accepted Answer

Anaphase

Question 13

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

Accepted Answer

It enables growth, tissue repair, and maintenance by producing genetically identical cells

Question 14

A cell is observed to have chromosomes that are highly condensed and visible, but the nuclear envelope is still intact. Which stage is this cell most likely in?

Accepted Answer

Prophase

Question 15

Which of the following statements about the S phase is correct?

Accepted Answer

S phase is when DNA is replicated, resulting in two identical sister chromatids for each chromosome

Question 16

If a cell spends a very short time in G$_1$ phase and rapidly enters S phase, what might be a potential risk for the organism?

Accepted Answer

Insufficient cell growth and accumulation of mutations

Question 17

Which of the following best describes the difference between karyokinesis and cytokinesis?

Accepted Answer

Karyokinesis is the division of the nucleus, while cytokinesis is the division of the cytoplasm

Question 18

A researcher is studying a population of cells and finds that some cells have exited the cell cycle and are not preparing to divide. Which phase are these cells most likely in?

Accepted Answer

G$_0$ phase

Question 19

Which of the following is a direct result of the completion of the S phase?

Accepted Answer

Each chromosome consists of two identical sister chromatids

Question 20

Which of the following best explains why proper regulation of mitosis is critical for organismal health?

Accepted Answer

Unregulated mitosis can result in tumor formation and morphological abnormalities

Mitosis and the Eukaryotic Cell Cycle: Division of Somatic Cells

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