During the respiration of an organism A, 1 molecule of glucose produces 2 ATP molecules whereas, in the respiration of another organism B, 1 molecule of glucose produces 38 ATP molecules.

(b) Which organism is undergoing anaerobic respiration?

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Solution

Answer:
Organism A is undergoing anaerobic respiration because in anaerobic respiration, 1 molecule of glucose is incompletely broken down or oxidised into either lactic acid or ethanol and carbon dioxide, and along with it only 2 ATPs are generated.
1 Glucose → Lactic acid + 2 ATP
1 Glucose → $2 C_{2} H_{5} O H (e t h a n o l) + 2 C O_{2} + 2 A T P$

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