The first step of the Krebs cycle involves the condensation of Acetyl CoA with which 4-carbon compound?
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Correct answer: Oxaloacetic acid (OAA)
Acetyl CoA (2C) combines with Oxaloacetic acid (4C) to form Citric acid (6C). This reaction is catalyzed by the enzyme citrate synthase and marks the beginning of the cycle.
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