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What is the link reaction in aerobic respiration?

APyruvate is carboxylated, acetyl reacts with coenzyme A, reducing NADH + H+
BPyruvate is decarboxylated, acetyl reacts with coenzyme A, forming NADH + H+
CPyruvate reacts with coenzyme A, forming NADH + H+
DPyruvate is decarboxylated, reacting with coenzyme A, reducing NADH + H+

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mooncrawler45

B. is the correct answer. - Pyruvate is decarboxylated, acetyl reacts with coenzyme A, forming NADH + H+

During the Krebs Cycle ( also known as the Citric Acid Cycle) the Pyruvate molecule decarboxylated ( meaning it lose a carbon a carbon dioxide molecule) and forms the molecule acetyl- coenzyme A also known as (acetyl CoA). Furthermore, NAD+ ( nicotinamide adenine dinucleotide)  reacts with H+ to form NADH 

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