How Does the Reductive (Reverse) TCA Cycle Participate in Carbon

question 56

Multiple Choice

How does the reductive (reverse) TCA cycle participate in carbon fixation?

• A) Some of the TCA reactions occur in reverse, assimilating small amounts of CO₂.
• B) CO₂ assimilation replenishes TCA intermediates for anabolic pathways.
• C) Reverse TCA regenerates acetyl-CoA, which may enter gluconeogenesis via pyruvate.
• D) All of the above.
• E) None of the above.

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