Which organelle is the site of aerobic respiration and ATP synthesis?
Correct answer: B. Mitochondrion
- A. Lysosome
- B. Mitochondrion
- C. Golgi apparatus
- D. Smooth endoplasmic reticulum
Explanation
The Krebs cycle runs in the mitochondrial matrix and the electron transport chain sits in the inner membrane, where the proton gradient drives ATP synthase. The inner membrane is folded into cristae to increase that surface area, which is why heart muscle cells are packed with mitochondria. Lysosomes digest material, and the Golgi and smooth ER handle processing and lipid synthesis.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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