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Question (1)

QN0026426

A microscope field has a diameter of 6000 µm. If 30 similar cells fit exactly across the diameter, what is the approximate size of one cell?

(A) 20 µm
(B) 50 µm
(C) 200 µm
(D) 300 µm

Correct Answer: C

Explanation:

Cell size = 6000 ÷ 30 = 200 µm.

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Question (2)

QN0026427

Which organelle would be maximum in number in a muscle cell that requires large amounts of energy?

(A) Ribosomes
(B) Vacuoles
(C) Mitochondria
(D) Lysosomes

Correct Answer: C

Explanation:

Mitochondria produce ATP required for muscular activity.

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Question (3)

QN0026428

A student observes a cell having cell wall, chloroplast and a large central vacuole. The organism is most likely:

(A) Animal
(B) Fungus
(C) Plant
(D) Bacterium

Correct Answer: C

Explanation:

Chloroplast and large vacuole are characteristic of plant cells.

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Question (4)

QN0026429

If a bacterial cell doubles every 40 minutes, how many cells will be formed from one bacterium in 2 hours?

(A) 4
(B) 8
(C) 16
(D) 32

Correct Answer: B

Explanation:

2 hours = 120 minutes = 3 divisions → 2³ = 8.

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Question (5)

QN0026430

Which structure mainly controls the entry and exit of substances in both plant and animal cells?

(A) Cell wall
(B) Plasma membrane
(C) Cytoplasm
(D) Vacuole

Correct Answer: B

Explanation:

Plasma membrane is selectively permeable.

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Question (6)

QN0026431

A cell lacking membrane-bound organelles and true nucleus is classified as:

(A) Eukaryotic
(B) Multicellular
(C) Prokaryotic
(D) Fungal

Correct Answer: C

Explanation:

Prokaryotes lack true nucleus and membrane-bound organelles.

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Question (7)

QN0026432

Which of the following combinations correctly matches organelle and function?

(A) Ribosome — Lipid synthesis
(B) Golgi apparatus — Packaging and secretion
(C) Lysosome — Photosynthesis
(D) Vacuole — ATP formation

Correct Answer: B

Explanation:

Golgi apparatus modifies and packages materials.

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Question (8)

QN0026433

A cell contains 12 chromosomes before mitosis. How many chromosomes will each daughter cell receive after division?

(A) 6
(B) 12
(C) 24
(D) 48

Correct Answer: B

Explanation:

Mitosis maintains chromosome number.

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Question (9)

QN0026434

Which scientist proposed that all cells arise from pre-existing cells?

(A) Hooke
(B) Schleiden
(C) Virchow
(D) Schwann

Correct Answer: C

Explanation:

Virchow proposed “Omnis cellula e cellula”.

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Question (10)

QN0026435

A plant cell placed in concentrated salt solution loses water and shrinks. This process is called:

(A) Diffusion
(B) Endosmosis
(C) Plasmolysis
(D) Photosynthesis

Correct Answer: C

Explanation:

Water loss causes plasma membrane to shrink away from cell wall.

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Question (1)

A microscope field has a diameter of 6000 µm. If 30 similar cells fit exactly across the diameter, what is the approximate size of one cell?

Explanation:

Link:

Question (2)

Which organelle would be maximum in number in a muscle cell that requires large amounts of energy?

Explanation:

Link:

Question (3)

A student observes a cell having cell wall, chloroplast and a large central vacuole. The organism is most likely:

Explanation:

Link:

Question (4)

If a bacterial cell doubles every 40 minutes, how many cells will be formed from one bacterium in 2 hours?

Explanation:

Link:

Question (5)

Which structure mainly controls the entry and exit of substances in both plant and animal cells?

Explanation:

Link:

Question (6)

A cell lacking membrane-bound organelles and true nucleus is classified as:

Explanation:

Link:

Question (7)

Which of the following combinations correctly matches organelle and function?

Explanation:

Link:

Question (8)

A cell contains 12 chromosomes before mitosis. How many chromosomes will each daughter cell receive after division?

Explanation:

Link:

Question (9)

Which scientist proposed that all cells arise from pre-existing cells?

Explanation:

Link:

Question (10)

A plant cell placed in concentrated salt solution loses water and shrinks. This process is called:

Explanation:

Link:

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