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Question

Kreb's cycle takes place in

A
Vesicles of E.R
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B
Mitochondria
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C
Dictyosomes
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D
Chloroplasts
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Solution

The correct option is B Mitochondria
Kreb cycle is also known as the citric acid cycle or tricarboxylic acid cycle takes place in the inner membrane of mitochondria. It occurs there because the necessary enzyme for the Krebs cycle, succinic dehydrogenase is only found in the inner membrane of the mitochondria.
This is the only enzyme that has FAD as coenzymes and thus there is a formation of FADH₂ molecule.
Mitochondria are only associated with aerobic respiration.
So, the correct option is 'Mitochondria'

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