alleryStart learning →Respiration in living cells primarily produces energy by breaking down
AGlucose into carbon dioxide and water
BProteins into amino acid building blocks
CFats into glycerol and fatty acid chains
DStarch into hydrogen gas and oxygen
Answer & Solution
Correct answer: A. Glucose into carbon dioxide and water
1. Section 7.1 names glucose as the main respiratory substrate.
2. Glucose breaks down to release energy stored in its bonds.
3. The end products are CO2 and water.
4. So option A is correct.
_Source: Selina Concise Biology Class 9, Ch 7 Respiration in Plants (Mistral OCR'd PDF), section 7.1_
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