Formative Practice 7.2 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
State the meaning of aerobic respiration.

Aerobic respiration is the breakdown of glucose in the presence of oxygen to produce chemical energy.

Question 2:
Suggest another substrate apart from glucose that can be used by cells for cellular respiration.

Fructose, galactose.

Question 3:
State the word equation for aerobic respiration.

Glucose + oxygen —> carbon dioxide + water + energy

Question 4:
Describe the processes involved in aerobic respiration to produce energy.

Sugar breakdown (glycolysis) takes place in the cytoplasm. Glucose (6-carbon) is broken down to two pyruvate molecules (3-carbon). In the next stage, pyruvate is oxidised through a series of reactions to produce carbon dioxide, water and energy. This stage takes place in the mitochondrion.

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