Q1 MCQ Drill: 2021 Life Sciences P2 (2021 NSC May/June Mid-Year Examination)

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

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7 multiple-choice questions taken verbatim from Section A of the official 2021 NSC May/June Mid-Year Examination Life Sciences Paper 2, 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 7 2 Marks

Which ONE of the following is a reproductive isolation mechanism?

A. Breeding at the same time of the year

B. Adaptation to the same pollinators

C. Prevention of fertilisation

D. Sharing the same habitat

Question 2 of 7 2 Marks

The scientists who won the Nobel Prize for the discovery of the structure of DNA were …

A. Watson and Franklin.

B. Wilkins and Franklin.

C. Crick and Wilkins.

D. Watson and Crick.

Question 3 of 7 2 Marks

In a dihybrid cross, an animal with long ears (E) and red fur (R) was crossed with an animal with short ears (e) and black fur (r). Which ONE of the following could represent the genotypes of the parents?

A. EERR x eerr

B. EeRr x EeRr

C. eeRR x eerr

D. Eerr x EERr

Question 4 of 7 2 Marks

Which ONE of the following reduces genetic variation in the offspring?

A. Mutations

B. Random mating

C. Cloning

D. Random fertilisation

Question 5 of 7 2 Marks

Meiosis is best explained as a process that produces … daughter cells.

A. two haploid

B. two diploid

C. four diploid

D. four haploid

Question 6 of 7 2 Marks

Colour-blindness is a disorder caused by a recessive allele on the X chromosome. Which ONE of the following is the genotype of a colour-blind person?

A. XDXD

B. XDY

C. XDXd

D. XdY

Question 7 of 7 2 Marks

The study of the inheritance of mutations in mitochondrial DNA is an example of …

A. fossil evidence.

B. genetic evidence.

C. modification by descent.

D. cultural evidence.

Q1 MCQ Drill: 2021 Life Sciences P2 (2021 NSC May/June Mid-Year Examination)

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