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Question (11)

QN007569

Which statement correctly describes a selectively permeable membrane?

(A) It allows all substances to pass through
(B) It blocks all substances completely
(C) It allows only certain substances to pass through
(D) It allows only water to pass through

Correct Answer: C

Explanation:

Selectively permeable membranes allow only some substances to pass.

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Question (12)

QN007570

The plasma membrane is mainly composed of:

(A) Cellulose and starch
(B) Lipids and proteins
(C) DNA and RNA
(D) Sugars and minerals

Correct Answer: B

Explanation:

Plasma membrane contains lipids and proteins.

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Question (13)

QN007571

In the fluid mosaic model, proteins present in the membrane mainly act as:

(A) Energy producers
(B) Pigment molecules
(C) Gatekeepers
(D) Chromosomes

Correct Answer: C

Explanation:

Membrane proteins regulate movement of substances.

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Question (14)

QN007572

The cell wall in plants is mainly made up of:

(A) Glycogen
(B) Protein
(C) Cellulose
(D) Chitin

Correct Answer: C

Explanation:

Plant cell walls are mainly made of cellulose.

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Question (15)

QN007573

Which property of the cell wall helps plant roots absorb water and minerals?

(A) Rigidity only
(B) Permeability
(C) Elasticity
(D) Thickness

Correct Answer: B

Explanation:

The cell wall is permeable to water and minerals.

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Question (16)

QN007574

Why do animal cells shrink considerably in concentrated sugar solution?

(A) They have chloroplasts
(B) They lack a rigid cell wall
(C) They contain large vacuoles
(D) They absorb sugar rapidly

Correct Answer: B

Explanation:

Animal cells lack a rigid cell wall and shrink due to water loss.

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Question (17)

QN007575

Which of the following is present in prokaryotic cells?

(A) Membrane-bound nucleus
(B) Golgi apparatus
(C) Nucleoid
(D) Mitochondria

Correct Answer: C

Explanation:

Prokaryotic cells contain a nucleoid region.

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Question (18)

QN007576

The term ‘eu’ in eukaryotic means:

(A) Primitive
(B) Small
(C) True
(D) Circular

Correct Answer: C

Explanation:

‘Eu’ means true.

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Question (19)

QN007577

Which pair correctly matches the cell type with cell diameter?

(A) Prokaryotic: 10–100 µm
(B) Eukaryotic: 1–10 µm
(C) Prokaryotic: 1–10 µm
(D) Eukaryotic: less than 1 µm

Correct Answer: C

Explanation:

Prokaryotic cells are generally 1–10 µm in diameter.

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Question (20)

QN007578

Which structure provides structural support and internal transport in eukaryotic cells?

(A) Cytoskeleton
(B) Ribosome
(C) Nucleolus
(D) Chromoplast

Correct Answer: A

Explanation:

Cytoskeleton maintains shape and transport inside the cell.

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Question (11)

Which statement correctly describes a selectively permeable membrane?

Explanation:

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Question (12)

The plasma membrane is mainly composed of:

Explanation:

Link:

Question (13)

In the fluid mosaic model, proteins present in the membrane mainly act as:

Explanation:

Link:

Question (14)

The cell wall in plants is mainly made up of:

Explanation:

Link:

Question (15)

Which property of the cell wall helps plant roots absorb water and minerals?

Explanation:

Link:

Question (16)

Why do animal cells shrink considerably in concentrated sugar solution?

Explanation:

Link:

Question (17)

Which of the following is present in prokaryotic cells?

Explanation:

Link:

Question (18)

The term ‘eu’ in eukaryotic means:

Explanation:

Link:

Question (19)

Which pair correctly matches the cell type with cell diameter?

Explanation:

Link:

Question (20)

Which structure provides structural support and internal transport in eukaryotic cells?

Explanation:

Link:

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