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Anaerobic respiration releases less energy than aerobic because
AAerobic respiration uses sunlight directly for the energy
BAnaerobic respiration uses two molecules of glucose
CAnaerobic enzymes are far less efficient at low temperature
DGlucose breakdown is incomplete without oxygen
Answer & Solution
Correct answer: D. Glucose breakdown is incomplete without oxygen
1. Aerobic respiration fully oxidises glucose to CO2 and water.
2. Anaerobic respiration leaves ethanol or lactic acid with much energy still locked in.
3. So the energy yield is small.
4. Hence option A is correct.
_Source: Selina Concise Biology Class 9, Ch 7 Respiration in Plants (Mistral OCR'd PDF), section on aerobic vs anaerobic_
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