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Question (21)

QN007579

The dense round body inside the nucleus where ribosomal subunits are formed is called:

(A) Chromatin
(B) Nucleolus
(C) Centrosome
(D) Vacuole

Correct Answer: B

Explanation:

Ribosomal subunits are formed in the nucleolus.

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Question (22)

QN007580

Genes are functional segments of:

(A) Proteins
(B) Lipids
(C) DNA
(D) Cellulose

Correct Answer: C

Explanation:

Genes are segments of DNA.

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Question (23)

QN007581

Chromosomes become clearly visible when:

(A) The cell is resting
(B) The cell is about to divide
(C) Photosynthesis occurs
(D) Osmosis occurs

Correct Answer: B

Explanation:

Chromosomes become visible during cell division.

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Question (24)

QN007582

Human mature red blood cells lack a nucleus mainly to:

(A) Increase flexibility only
(B) Increase oxygen-carrying capacity
(C) Prevent osmosis
(D) Enable cell division

Correct Answer: B

Explanation:

Absence of nucleus provides more space for haemoglobin.

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Question (25)

QN007583

Ribosomes are called protein factories because they are the sites of:

(A) Lipid digestion
(B) Protein synthesis
(C) ATP production
(D) Water storage

Correct Answer: B

Explanation:

Ribosomes synthesize proteins.

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Question (26)

QN007584

Which type of endoplasmic reticulum has ribosomes attached to its surface?

(A) SER
(B) Smooth ER
(C) Rough ER
(D) Vacuolar ER

Correct Answer: C

Explanation:

Rough ER has ribosomes attached.

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Question (27)

QN007585

Which organelle modifies, sorts and packages proteins for transport?

(A) Lysosome
(B) Ribosome
(C) Golgi apparatus
(D) Nucleus

Correct Answer: C

Explanation:

Golgi apparatus packages and transports proteins.

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Question (28)

QN007586

Lysosomes help in keeping the cell clean by:

(A) Producing chlorophyll
(B) Breaking down unwanted materials
(C) Storing ATP
(D) Producing ribosomes

Correct Answer: B

Explanation:

Lysosomes digest waste and damaged organelles.

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Question (29)

QN007587

The inner membrane of mitochondria is folded into structures called:

(A) Grana
(B) Cisternae
(C) Cristae
(D) Vacuoles

Correct Answer: C

Explanation:

Cristae increase surface area for respiration.

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Question (30)

QN007588

ATP is known as the energy currency of the cell because it:

(A) Stores genetic information
(B) Gives shape to the cell
(C) Supplies usable energy for activities
(D) Produces proteins

Correct Answer: C

Explanation:

ATP stores and supplies energy for cellular activities.

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Question (21)

The dense round body inside the nucleus where ribosomal subunits are formed is called:

Explanation:

Link:

Question (22)

Genes are functional segments of:

Explanation:

Link:

Question (23)

Chromosomes become clearly visible when:

Explanation:

Link:

Question (24)

Human mature red blood cells lack a nucleus mainly to:

Explanation:

Link:

Question (25)

Ribosomes are called protein factories because they are the sites of:

Explanation:

Link:

Question (26)

Which type of endoplasmic reticulum has ribosomes attached to its surface?

Explanation:

Link:

Question (27)

Which organelle modifies, sorts and packages proteins for transport?

Explanation:

Link:

Question (28)

Lysosomes help in keeping the cell clean by:

Explanation:

Link:

Question (29)

The inner membrane of mitochondria is folded into structures called:

Explanation:

Link:

Question (30)

ATP is known as the energy currency of the cell because it:

Explanation:

Link:

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