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Which of the following compounds is the first member of the TCA cycle?

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in Biology – Class 11 by (272k points)
Which of the following compounds is the first member of the TCA cycle?

(a) Oxaloacetic acid

(b) α-ketoglutaric acid

(c) Succinic acid

(d) Malic acid

The question was asked during an interview for a job.

My doubt stems from Aerobic Respiration in chapter Respiration in Plants of Biology – Class 11

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The correct answer is (a) Oxaloacetic acid

For explanation I would say: Oxaloacetic acid is the first member of the TCA cycle. The continued oxidation of acetyl CoA via the TCA cycle requires the continued replenishment of Oxaloacetic acid.

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