Which of the following is not present in mitochondria?
Correct answer: D. Thylakoids
- A. Enzymes
- B. Co-enzymes
- C. Ribosomes
- D. Thylakoids
Explanation
Mitochondria contain respiratory enzymes, coenzymes and their own ribosomes, reflecting their bacterial evolutionary origin. Thylakoids are flattened photosynthetic membranes found in chloroplasts, not mitochondria. Students may select ribosomes because mitochondria are often described mainly as energy-producing organelles, but mitochondrial ribosomes are present.
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