In the first step of the citric acid cycle, acetyl CoA reacts with oxaloacetate to form (a) pyruvate (b) citrate (c) NADH (d) $\mathrm{ATP}$ (e) $\mathrm{CO}_{2}$
Added by Lawrence M.
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(b) citrate - This is the correct answer, as the combination of acetyl CoA and oxaloacetate forms citrate in the first step of the citric acid cycle. (c) NADH - This is not correct, as NADH is produced in later steps of the citric acid cycle. Show more…
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What occurs in the first step of the citric acid cycle? A. ATP is consumed. NADH is produced. B. Two molecules of acetyl CoA combine to form oxaloacetate. C. CO2 is released. D. A two-carbon molecule is combined with a four-carbon molecule to form citrate.
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In the first step of the citric acid cycle: a) Acetyl-CoA is bound to the enzyme citrate synthase, and then it undergoes a condensation reaction with oxaloacetate. b) Acetyl-CoA undergoes a free condensation reaction with oxaloacetate. c) Oxaloacetate is bound to the enzyme citrate synthase and then it undergoes a condensation reaction with acetyl-CoA. d) Oxaloacetate is bound to the enzyme acetate dehydrogenase and then it undergoes a condensation reaction with acetyl-CoA.
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