Question 1

Which of the following correctly lists the two major periods of the cell cycle and briefly describes their primary functions?

Accepted Answer

Interphase (cell growth and DNA replication) and Mitotic phase (cell division)

Question 2

During interphase, which subphase is responsible for DNA replication, and what is the main event that occurs?

Accepted Answer

S phase; DNA is synthesized and chromosomes are duplicated

Question 3

Order the phases of mitosis and match each with its key event.

Accepted Answer

Prophase (chromosomes condense), Metaphase (chromosomes align), Anaphase (chromatids separate), Telophase (nuclear envelope reforms)

Question 4

Which structure is responsible for organizing spindle fibers during mitosis in animal cells?

Accepted Answer

Aster

Question 5

In plant cells, what structure forms during cytokinesis to separate the two daughter cells, and what is its function?

Accepted Answer

Cell plate; it develops into the new cell wall between daughter cells

Question 6

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

Accepted Answer

They attach to chromosomes and help separate sister chromatids during anaphase

Question 7

A student observes a cell under a microscope and notes the presence of a cleavage furrow. What type of cell and phase is most likely being observed?

Accepted Answer

Animal cell during cytokinesis

Question 8

Which of the following is a key difference between cytokinesis in animal and plant cells?

Accepted Answer

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

Question 9

If a cell fails to complete the S phase of interphase, which of the following consequences is most likely?

Accepted Answer

Chromosomes will not be properly duplicated, leading to errors in mitosis

Question 10

During which phase of mitosis do sister chromatids separate and move toward opposite poles, and what is the force responsible for this movement?

Accepted Answer

Anaphase; spindle fibers pull chromatids apart

Question 11

A researcher stains cells to visualize chromosomes and observes that the nuclear envelope is dissolving and spindle fibers are forming. Which phase of mitosis is being observed?

Accepted Answer

Prophase

Question 12

Which of the following best describes the relationship between chromatids and chromosomes during mitosis?

Accepted Answer

Each chromosome consists of two sister chromatids joined at the centromere until anaphase

Question 13

Which equation best represents the change in chromosome number during mitosis?

Accepted Answer

$$2n \rightarrow 2n$$

Question 14

A cell in metaphase is exposed to a drug that disrupts spindle fiber formation. What is the most likely outcome?

Accepted Answer

Chromosomes will fail to separate, resulting in mitotic arrest

Question 15

Which of the following is the correct order of the subphases of interphase?

Accepted Answer

G1, S, G2

Question 16

A student is asked to identify the phase of mitosis in a plant cell where the cell plate is visible. Which phase should they select?

Accepted Answer

Cytokinesis

Question 17

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

Accepted Answer

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

Question 18

If a mutation prevents the formation of asters in an animal cell, which process would be most directly affected?

Accepted Answer

Spindle fiber organization during mitosis

Question 19

During which phase of mitosis does the nuclear envelope reform and chromosomes decondense?

Accepted Answer

Telophase

Question 20

A patient’s cells are observed to have abnormal chromosome numbers after cell division. Which phase of the cell cycle is most likely to have malfunctioned?

Accepted Answer

Anaphase, due to improper separation of chromatids

The Cell Cycle and Mitosis: Study Guide for Anatomy & Physiology

Study Guide - Practice Questions

Study Guide - Flashcards