Question 1

Which phase of the cell cycle is primarily responsible for the duplication of chromosomes?

Accepted Answer

S phase

Question 2

A human somatic cell contains 46 chromosomes. After mitosis and cytokinesis, how many chromosomes will each daughter cell contain?

Accepted Answer

46 chromosomes

Question 3

Which of the following best describes the role of cell division in multicellular eukaryotes?

Accepted Answer

For growth, repair, and development

Question 4

What is the correct sequence of phases in the cell cycle?

Accepted Answer

G1 → S → G2 → M

Question 5

Which structure is composed of DNA and proteins and serves as the building material of chromosomes?

Accepted Answer

Chromatin

Question 6

If a mutation prevents a cell from completing the S phase, what is the most likely consequence?

Accepted Answer

The cell will not duplicate its chromosomes

Question 7

Which of the following organelles is responsible for cellular energy exchange in eukaryotic cells?

Accepted Answer

Mitochondria

Question 8

During which phase of the cell cycle does the cell prepare for division by growing and producing proteins necessary for mitosis?

Accepted Answer

G2 phase

Question 9

Which of the following statements about eukaryotic chromosomes is TRUE?

Accepted Answer

They consist of DNA and proteins

Question 10

A scientist observes a cell with a clearly defined nucleus and several organelles, including mitochondria and lysosomes. What type of cell is this?

Accepted Answer

Eukaryotic cell

Question 11

Which of the following best explains why gametes have half the number of chromosomes compared to somatic cells?

Accepted Answer

To maintain the species-specific chromosome number after fertilization

Question 12

If a human cell fails to complete cytokinesis after mitosis, what will be the result?

Accepted Answer

A single cell with two nuclei

Question 13

Which phase of the cell cycle is the longest and why?

Accepted Answer

Interphase, because it includes cell growth and DNA replication

Question 14

A patient has a genetic disorder affecting the structure of chromatin. Which cellular process is most likely to be directly impacted?

Accepted Answer

Chromosome condensation during cell division

Question 15

Which of the following equations correctly represents the chromosome number in human somatic cells?

Accepted Answer

$$46 = 2 	imes 23$$

Question 16

Which of the following best describes the difference between prokaryotic and eukaryotic genomes?

Accepted Answer

Eukaryotic genomes consist of multiple DNA molecules, while prokaryotic genomes are usually a single DNA molecule

Question 17

Which organelle is responsible for the digestion of cellular waste in eukaryotic cells?

Accepted Answer

Lysosome

Question 18

A cell is observed to be synthesizing DNA. In which phase of the cell cycle is this cell most likely to be?

Accepted Answer

S phase

Question 19

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

Accepted Answer

Production of gametes

Question 20

If a cell's chromatin fails to condense properly during cell division, what is the most likely outcome?

Accepted Answer

Chromosomes may not segregate correctly

Chromosomes and Cell Division: The Cell Cycle in Eukaryotes

Study Guide - Practice Questions