Home / iGCSE Biology (0610)-12.2 Aerobic respiration – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-12.2 Aerobic respiration – iGCSE Style Questions Paper 1

Question

What are the products of aerobic respiration in plants?

A) alcohol and carbon dioxide
B) carbon dioxide and lactic acid
C) carbon dioxide and water
D) lactic acid only

▶️ Answer/Explanation
Solution

Ans: C

Aerobic respiration in plants follows the equation:
Glucose + Oxygen → Carbon dioxide + Water + Energy (ATP).

Option C (carbon dioxide and water) matches this equation. Alcohol (A) is produced in anaerobic respiration (fermentation), while lactic acid (B, D) is an animal cell byproduct during oxygen debt.

Thus, the correct answer is C.

Question

What is the word equation for aerobic respiration?

A) carbon dioxide + glucose → oxygen + water
B) carbon dioxide + water → oxygen + glucose
C) oxygen + glucose → carbon dioxide + water
D) oxygen + water → carbon dioxide + glucose

▶️ Answer/Explanation
Solution

Ans: C

The word equation for aerobic respiration is:

\[ \text{glucose} + \text{oxygen} \rightarrow \text{carbon dioxide} + \text{water} + \text{energy} \]

This process occurs in cells to release energy, with oxygen breaking down glucose into carbon dioxide and water.

Options A, B, and D incorrectly reverse the reactants and products. Only C matches the correct equation.

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