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Question

The first stable compound of the citric acid is

A
Citric acid
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B
Pyruvic acid
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C
Oxaloacetic acid
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D
None of the above
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Solution

The correct option is A Citric acid
Krebs' cycle was discovered by Sir Hans Krebs occur inside the matrix of mitochondria. The cycle is also named as a citric acid cycle. Acetyl CoA (2C) (produced by oxidative decarboxylation of pyruvate in mitochondria) is a substrate entrant for Krebs cycle. While the oxaloacetate (4C) is an acceptor molecule of Krebs cycle. During Krebs cycle, the acetyl Co-A combines with oxaloacetate in the presence of condensing enzyme citrate synthetase to form the tricarboxylic 6-carbon compound called citric acid. It is the first product of Krebs' cycle.
So, the correct answer is option C.

723240_682963_ans_f886b867341041aea0d5ee54bdbf9dd9.jpg

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