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Answer: 3. Mitochondrion

Key idea: ATP is made from the breakdown of food by cellular respiration.

The mitochondrion oxidises pyruvate from carbohydrate through the Krebs cycle and ETC to make most of the ATP. Ribosomes make proteins, chloroplasts make carbohydrates, and lysosomes digest. Answer: (3).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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