Cell Division Practice Questions
HSC/SSC (Bangladesh) · HSC Biology · 139 free MCQs with instant results and detailed explanations.
139
Total
40
Easy
68
Medium
31
Hard
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Sample Questions from Cell Division
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Q1
Easy
During which phase of mitosis do sister chromatids separate and move towards opposite poles of the cell?
A.
Anaphase
B.
Metaphase
C.
Prophase
D.
Telophase
Show Answer & Explanation
Correct Answer: A
Sister chromatids separate during anaphase, which is a key stage in mitosis, ensuring that each daughter cell receives an identical set of chromosomes.
Q2
Easy
In which type of cell division does crossing over occur, contributing to genetic variability?
A.
Mitosis
B.
Meiosis
C.
Binary Fission
D.
Cell Fusion
Show Answer & Explanation
Correct Answer: B
Crossing over occurs during meiosis, specifically in prophase I, allowing for the exchange of genetic material and increasing genetic diversity among gametes.
Q3
Easy
What is the primary purpose of the cell cycle's checkpoint mechanisms?
A.
To increase cell size
B.
To prevent uncontrolled cell division
C.
To promote cell death
D.
To enhance nutrient uptake
Show Answer & Explanation
Correct Answer: B
Checkpoint mechanisms in the cell cycle are crucial for preventing uncontrolled cell division by ensuring that cells only progress to the next stage when conditions are right.
Q4
Medium
During which phase of mitosis do sister chromatids separate and move towards opposite poles?
A.
Metaphase
B.
Anaphase
C.
Telophase
D.
Prophase
Show Answer & Explanation
Correct Answer: B
Anaphase is the stage where sister chromatids are pulled apart and move towards opposite ends of the cell, ensuring that each new daughter cell will receive an identical set of chromosomes.
Q5
Medium
What is the main purpose of meiosis in sexually reproducing organisms?
A.
Growth
B.
Repair
C.
Production of gametes
D.
Asexual reproduction
Show Answer & Explanation
Correct Answer: C
Meiosis is crucial for the production of gametes (sperm and eggs) by reducing the chromosome number by half, which is essential for maintaining the species' chromosome number across generations.
Q6
Medium
A cell with 8 chromosomes undergoes meiosis. How many chromosomes will each daughter cell have?
A.
4
B.
8
C.
16
D.
2
Show Answer & Explanation
Correct Answer: A
Meiosis reduces the chromosome number by half. Therefore, a cell with 8 chromosomes will produce daughter cells with 4 chromosomes each.
Q7
Medium
Which of the following processes ensures genetic variation during meiosis?
A.
Crossing over
B.
Interphase
C.
Cytokinesis
D.
Binary fission
Show Answer & Explanation
Correct Answer: A
Crossing over occurs during prophase I of meiosis, allowing for the exchange of genetic material between homologous chromosomes, which leads to genetic variation in gametes.
Q8
Hard
Which of the following correctly describes the role of cyclins in the cell cycle?
A.
Cyclins are proteins that regulate the progression of cells through the cell cycle by activating cyclin-dependent kinases.
B.
Cyclins function as enzymes that directly induce DNA replication during the S phase.
C.
Cyclins inhibit the activity of mitotic spindles during cell division.
D.
Cyclins are produced only during the G1 phase and are degraded in the M phase.
Show Answer & Explanation
Correct Answer: A
Cyclins are crucial regulatory proteins that bind to and activate cyclin-dependent kinases (CDKs), which then drive the cell through various phases of the cell cycle. This mechanism is essential for proper cell cycle regulation.
Q9
Hard
If a cell has a diploid number of 16, how many chromatids will be present during metaphase of mitosis?
A.
16
B.
32
C.
8
D.
24
Show Answer & Explanation
Correct Answer: B
During metaphase of mitosis, each chromosome has been replicated and consists of two sister chromatids. Therefore, if the diploid number is 16, there will be 16 chromosomes, resulting in 32 chromatids (16 x 2).
Q10
Hard
During which phase of mitosis does the nuclear envelope begin to break down?
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Show Answer & Explanation
Correct Answer: A
The nuclear envelope begins to break down during prophase, allowing the chromatin to condense into visible chromosomes and facilitating the arrangement of spindle fibers.
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Cell Division — HSC/SSC (Bangladesh) HSC Biology Practice Questions Online
This page contains 139 practice MCQs for the chapter Cell Division in HSC/SSC (Bangladesh) HSC Biology. The questions are organized by difficulty — 40 easy, 68 medium, 31 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.