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Succinate dehydrogenase, also known as succinate-coenzyme Q reductase or Complex II in the respiratory chain, is an enzyme present in the inner mitochondrial membrane of eukaryotic cells and in many bacteria.

1. (a) Correct
2. (b) Incorrect
3. (c) Both (a) and (b)
4. (d) Neither (a) nor (b)

Correct answer: (a) Correct

Solution

Succinate dehydrogenase is indeed an enzyme complex located in the inner mitochondrial membrane of eukaryotes and also found in bacterial cells, as it plays a role in the Krebs cycle and electron transport chain.

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