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Question

FAD is electron acceptor in citric acid cycle during the oxidation of

A
Malic acid to oxaloacetatic acid.
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B
Succinic acid to malic acid.
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C
Citric acid to -ketoglutaric acid.
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D
α-ketoglutaric acid to succinic acid.
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Solution

The correct option is C Succinic acid to malic acid.
The Krebs cycle is the condensation of acetyl group with oxaloacetic acid and water to yield citric acid and leads to the formation of Oxalo acetic acid.
Eighth step in which Succinic acid converts into Fumaric acid in the presence of enzyme succinic dehydrogenase release energy and form FADH which yields 2ATP.
So the correct option is 'Succinic acid to Fumaric acid.'

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