Q1 MCQ Drill: 2022 Life Sciences P2 (2022 NSC May/June Mid-Year Examination)

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 2022 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 8 2 Marks

The components of a DNA molecule that provide the code for protein synthesis are the …

A. sugars.

B. phosphates.

C. hydrogen bonds.

D. nitrogenous bases.

Question 2 of 8 2 Marks

During which stage of meiosis do spindle fibres begin to form?

A. Prophase

B. Metaphase

C. Anaphase

D. Telophase

Question 3 of 8 2 Marks

An individual that has received an identical allele from each parent is described as being …

A. homologous.

B. dominant.

C. homozygous.

D. heterozygous.

Question 4 of 8 2 Marks

A plant species has a diploid chromosome number of 12. Which ONE of the following is the haploid chromosome number for this species?

A. 24

B. 12

C. 6

D. 36

Question 5 of 8 2 Marks

Inheritance by multiple alleles in genetics refers to …

A. two alleles that influence two characteristics.

B. more than two alleles that influence one characteristic.

C. one allele that influences more than one characteristic.

D. more than two alleles that influence two characteristics.

Question 6 of 8 2 Marks

Which ONE of the following is a reproductive isolation mechanism?

A. Breeding at the same time of the year

B. Infertile offspring

C. Plant adaptation to the same pollinators

D. Improved fertilisation

Question 7 of 8 2 Marks

Normal human ova have …

A. 22 autosomes and an X chromosome.

B. 23 autosomes and an X chromosome.

C. 22 autosomes and a Y chromosome.

D. 23 autosomes and a Y chromosome.

Question 8 of 8 2 Marks

Which ONE of the following occurs in mitosis but NOT in meiosis?

A. Two cells are formed at the end of the division

B. Crossing over takes place

C. Homologous chromosomes arrange at the equator

D. Centrioles form at the poles of the cell

Q1 MCQ Drill: 2022 Life Sciences P2 (2022 NSC May/June Mid-Year Examination)

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