Which of the following is not present in mitochondria?
Correct answer: D. Thylakoid
- A. Enzymes
- B. Coenzymes
- C. Ribosomes
- D. Thylakoid
Explanation
Thylakoids are specific to chloroplasts, where they facilitate photosynthesis by housing the chlorophyll and other components necessary for light reactions. In contrast, mitochondria are the powerhouse of the cell, involved in producing ATP through cellular respiration. The other options-enzymes, coenzymes, and ribosomes-are all integral to mitochondrial function. Enzymes like ATP synthase and coenzymes such as NADH and FADH2 are crucial for energy production, while ribosomes enable the organelle to produce some proteins independently.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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