The only 5-carbon compound formed in TCA cycle is

Succinic acid

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RUBP

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α

-ketoglutaric acid

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Malic acid

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Solution

The correct option is C $α$ -ketoglutaric acid
The only 5-carbon compound formed in TCA cycle is $α$ -ketoglutaric acid.
Succinic acid and malic acid are 4-carbon compounds. RUBP is a 5-carbon compound that acts as a carbon dioxide acceptor in the Calvin cycle in photosynthesis.

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