Q1 MCQ Drill: 2023 Life Sciences P1 (2023 Oct/Nov Final NSC (National DBE))

Life Sciences Past Paper Question 1 Drill Level 1: Knowledge & Recall

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8 multiple-choice questions taken verbatim from Section A of the official 2023 Oct/Nov Final NSC (National DBE) Life Sciences Paper 1, auto-marked against the official marking guideline. Questions that rely on diagrams or graphs are excluded - see the full paper for those.

Question 1 of 8 2 Marks

Which ONE of the following parts controls the amount of light entering the eye by influencing the size of the pupil?

A. Sclera

B. Cornea

C. Retina

D. Iris

Question 2 of 8 2 Marks

The function of the umbilical vein is to transport …

A. carbon dioxide from the foetus to the mother.

B. nutrients from the foetus to the mother.

C. carbon dioxide from the mother to the foetus.

D. nutrients from the mother to the foetus.

Question 3 of 8 2 Marks

Which ONE of the following is CORRECT regarding the homeostatic control of the carbon dioxide concentration in the blood?

A. The lungs have receptors.

B. High oxygen levels is the stimulus.

C. Breathing muscles are the effectors.

D. The process is controlled by the cerebrum.

Question 4 of 8 2 Marks

The plant hormones that can be used to kill broad-leaved weeds are …

A. abscisic acid only.

B. abscisic acid and gibberellins.

C. auxins only.

D. abscisic acid and auxins.

Question 5 of 8 2 Marks

A girl looking at a car moving away from her is able to focus on the letters on the number plate. Which ONE of the following changes occurred in her eyes?

A. The suspensory ligaments slackened.

B. The ciliary muscles relaxed.

C. Light rays were refracted more.

D. The lens became more convex.

Question 6 of 8 2 Marks

One of the characteristics of a sperm that causes it to move faster is the …

A. oval-shaped head.

B. haploid nucleus.

C. presence of enzymes in the acrosome.

D. absence of a middle piece.

Question 7 of 8 2 Marks

In a person suffering from long-sightedness, …

A. the eyeball is longer than normal.

B. light rays fall behind the retina.

C. light rays are refracted more by the lens.

D. distant objects will appear blurred.

Question 8 of 8 2 Marks

The following is a list of events that occur in the female body: (i) Puberty (ii) Ovulation (iii) Development of the corpus luteum (iv) Oogenesis (v) Thickening of the endometrium Which ONE of the following is a combination of events that are influenced by LH (luteinising hormone)?

A. (i), (ii), (iii), (iv) and (v)

B. (ii), (iii), (iv) and (v) only

C. (ii) and (iii) only

D. (iii) only

Q1 MCQ Drill: 2023 Life Sciences P1 (2023 Oct/Nov Final NSC (National DBE))

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