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During the transformation of succinyl CoA into succinic acid, the energy released from succinyl CoA hydrolysis is utilized to produce GTP. The reaction converting alpha-ketoglutarate to succinyl CoA requires NAD⁺ and CoA. The hydration of fumaric acid to malic acid is a straightforward process. FAD is involved in the oxidation of succinic acid to fumaric acid.

1. (a) Correct
2. (b) Incorrect
3. (c) Both (a) and (b)
4. (d) None of these

Correct answer: (a) Correct

Solution

All the statements provided in the question are correct and align with the steps of the Krebs cycle. Succinyl CoA hydrolysis generates GTP, α-ketoglutarate conversion requires NAD⁺ and CoA, fumaric acid hydration forms malic acid, and FAD is involved in the oxidation of succinic acid to fumaric acid.

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