BIOL180 Lesson 4 Quiz – Cell Division
and Genetics Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. During which phase of the cell cycle does DNA replication occur?
A. G₁ phase
B. S phase
C. G₂ phase
D. M phase
Rationale: DNA replication occurs during the S (Synthesis) phase of
interphase, ensuring that each chromosome is duplicated before cell
division begins.
2. Which stage of mitosis is characterized by chromosomes aligning along
the cell's equator?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
,Rationale: During metaphase, spindle fibers attach to chromosomes and
align them at the metaphase plate before separation.
3. What is the primary purpose of mitosis?
A. Produce gametes
B. Increase genetic variation
C. Produce two genetically identical daughter cells
D. Reduce chromosome number by half
Rationale: Mitosis produces two genetically identical diploid cells for
growth, repair, and asexual reproduction.
4. Which structure pulls sister chromatids apart during anaphase?
A. Centrioles
B. Ribosomes
C. Spindle fibers
D. Lysosomes
Rationale: Spindle fibers attached to kinetochores shorten during
anaphase, separating sister chromatids toward opposite poles.
5. Cytokinesis refers to:
A. DNA replication
B. Chromosome condensation
C. Nuclear division
D. Division of the cytoplasm
Rationale: Cytokinesis divides the cytoplasm, resulting in two separate
daughter cells after mitosis or meiosis.
6. In animal cells, cytokinesis occurs through the formation of a:
A. Cell plate
B. Cleavage furrow
, C. Middle lamella
D. Cell wall
Rationale: Animal cells divide by forming a cleavage furrow that pinches
the cell into two.
7. In plant cells, cytokinesis involves the formation of a:
A. Cleavage furrow
B. Centrosome
C. Cell plate
D. Nuclear envelope
Rationale: Plant cells build a cell plate that develops into a new cell wall
separating the daughter cells.
8. During which stage of mitosis do the nuclear envelope and nucleolus
disappear?
A. Prophase
B. Metaphase
C. Anaphase
D. Cytokinesis
Rationale: In prophase, chromosomes condense, and the nuclear envelope
breaks down to allow spindle attachment.
9. Sister chromatids separate during:
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Rationale: During anaphase, spindle fibers separate sister chromatids and
move them to opposite poles.
and Genetics Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. During which phase of the cell cycle does DNA replication occur?
A. G₁ phase
B. S phase
C. G₂ phase
D. M phase
Rationale: DNA replication occurs during the S (Synthesis) phase of
interphase, ensuring that each chromosome is duplicated before cell
division begins.
2. Which stage of mitosis is characterized by chromosomes aligning along
the cell's equator?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
,Rationale: During metaphase, spindle fibers attach to chromosomes and
align them at the metaphase plate before separation.
3. What is the primary purpose of mitosis?
A. Produce gametes
B. Increase genetic variation
C. Produce two genetically identical daughter cells
D. Reduce chromosome number by half
Rationale: Mitosis produces two genetically identical diploid cells for
growth, repair, and asexual reproduction.
4. Which structure pulls sister chromatids apart during anaphase?
A. Centrioles
B. Ribosomes
C. Spindle fibers
D. Lysosomes
Rationale: Spindle fibers attached to kinetochores shorten during
anaphase, separating sister chromatids toward opposite poles.
5. Cytokinesis refers to:
A. DNA replication
B. Chromosome condensation
C. Nuclear division
D. Division of the cytoplasm
Rationale: Cytokinesis divides the cytoplasm, resulting in two separate
daughter cells after mitosis or meiosis.
6. In animal cells, cytokinesis occurs through the formation of a:
A. Cell plate
B. Cleavage furrow
, C. Middle lamella
D. Cell wall
Rationale: Animal cells divide by forming a cleavage furrow that pinches
the cell into two.
7. In plant cells, cytokinesis involves the formation of a:
A. Cleavage furrow
B. Centrosome
C. Cell plate
D. Nuclear envelope
Rationale: Plant cells build a cell plate that develops into a new cell wall
separating the daughter cells.
8. During which stage of mitosis do the nuclear envelope and nucleolus
disappear?
A. Prophase
B. Metaphase
C. Anaphase
D. Cytokinesis
Rationale: In prophase, chromosomes condense, and the nuclear envelope
breaks down to allow spindle attachment.
9. Sister chromatids separate during:
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Rationale: During anaphase, spindle fibers separate sister chromatids and
move them to opposite poles.
