Formative Practice 5.1 – Form 4 Science (KSSM) Chapter 5

Question 1:
What is meant by
(a) gene
(b) chromosomes
(c) DNA

Answer:
(a)
A gene is a basic hereditary unit that determines an individual’s characteristics.

(b)
Chromosomes are fine thread-like, long and spiral structures located in the nucleus.

(c)
Deoxyribonucleic acid or DNA is a two twisted antiparallel polynucleotide chain forming a structure known as double helix.

Question 2:
Where do mitosis and meiosis take place in the human body?

Answer:
Mitosis takes place in the somatic cell and meiosis takes place in the reproductive organ.

Question 3:
State the similarities and differences between mitosis and meiosis.

Answer:
(Refer Figure 5.7, page 82 of the textbook, the double bubble map shows the similarities and differences between mitosis and meiosis)

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