Question 1

During which phase of the cell cycle does DNA replication occur, resulting in duplicated chromosomes each consisting of two sister chromatids?

Accepted Answer

Interphase

Question 2

After DNA replication in a human cell, how many chromosomes are present?

Accepted Answer

$$46$$

Question 3

Which of the following best describes what happens to the nuclear envelope during prophase?

Accepted Answer

It begins to degrade and its phospholipids are recycled to the cell membrane.

Question 4

What is the main event that occurs during metaphase of mitosis?

Accepted Answer

Duplicated chromosomes align at the equator of the cell.

Question 5

Which structure is responsible for pulling sister chromatids apart during anaphase?

Accepted Answer

Spindle fibers

Question 6

In animal cells, what structure forms to separate the cytoplasm during cytokinesis?

Accepted Answer

Cleavage furrow

Question 7

Which of the following organelles does NOT automatically replicate during interphase?

Accepted Answer

Centrioles

Question 8

Why is cytokinesis considered optional in some cell types such as muscle and nerve cells?

Accepted Answer

These cells often have multiple nuclei within a single large cell.

Question 9

What is the correct sequence of mitosis phases?

Accepted Answer

Interphase, Prophase, Metaphase, Anaphase, Telophase

Question 10

During which phase does the nuclear envelope re-form around each set of chromosomes?

Accepted Answer

Telophase

Question 11

If a plant cell is undergoing cytokinesis, what structure is responsible for forming the new cell wall between daughter cells?

Accepted Answer

Cell plate

Question 12

Which phase of mitosis is typically the shortest?

Accepted Answer

Metaphase

Question 13

What would happen if a cell skipped mitosis but underwent cytokinesis?

Accepted Answer

The cell would produce two daughter cells, each lacking a nucleus.

Question 14

Which of the following best describes the state of DNA during interphase?

Accepted Answer

Uncoiled in chromatin form

Question 15

A scientist observes a cell with chromosomes lined up at the equator and no nuclear envelope. Which phase is this cell in?

Accepted Answer

Metaphase

Question 16

Which event marks the transition from metaphase to anaphase?

Accepted Answer

Sister chromatids separate and move toward opposite poles.

Question 17

Why is mitosis essential before cytokinesis in most cells?

Accepted Answer

It ensures that each daughter cell receives a complete set of chromosomes.

Question 18

Which phase of mitosis is characterized by the separation of sister chromatids?

Accepted Answer

Anaphase

Question 19

If a mutation prevented spindle fibers from forming, what would be the most immediate effect during mitosis?

Accepted Answer

Chromosomes would not align at the equator or separate properly.

Question 20

Which of the following best explains why muscle cells can be multinucleated?

Accepted Answer

They undergo mitosis but not cytokinesis.

Mitosis (IPMAT) & Cytokinesis: Phases and Cellular Events

Study Guide - Practice Questions