Formative Practice 7.1 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
Give five examples of the necessity of energy in a metabolic process.

• Maintaining body temperature at the optimal temperature of 37 °C.

• Muscle contractions to enable movement.

• Cell division whereby new cells are produced for growth and development.

• Absorption of digested food through active transport.

• Synthesis of lipids, hormones, proteins and enzymes.

Question 2:
State the main substrate in the production of energy.

Carbohydrate (glucose).

Question 3:
State the meaning of cellular respiration and the types of cellular respiration.

Cellular respiration is the oxidation process of organic molecules through a few stages to release energy.
The main substrate for cellular respiration is glucose.
There are two types of cellular respiration:
aerobic respiration and anaerobic respiration.

Question 4:
Explain how humans, animals and plants acquire glucose to produce energy.

In humans and animals, glucose is obtained through the breakdown of carbohydrates whereas in plants, glucose is produced through photosynthesis.

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