Enzymes required for the respiratory chain are present on/in:
Correct answer: A. Cristae
- A. Cristae
- B. Mitochondrial matrix
- C. Inter-membrane space
- D. Cytoplasm
Explanation
The correct answer is cristae. Cristae are the folds within the inner mitochondrial membrane that house the enzymes for the electron transport chain, crucial for ATP synthesis. The other options are incorrect because they describe locations within the cell that do not contain these specific enzymes: the mitochondrial matrix is the site of the Krebs cycle, the intermembrane space is involved in the proton gradient, and the cytoplasm is where glycolysis takes place, not the electron transport chain.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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