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(C) The Krebs cycle (also known as the Citric Acid Cycle) involves a series of enzymatic reactions to oxidize one molecule of acetyl-CoA (derived from

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$8$

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(C) The Krebs cycle (also known as the Citric Acid Cycle) involves a series of enzymatic reactions to oxidize one molecule of acetyl-CoA (derived from one molecule of pyruvic acid) into $CO_2$ and $H_2O$.$1$. Citrate synthase: Acetyl-CoA + Oxaloacetate $\rightarrow$ Citrate.$2$. Aconitase: Citrate $\rightarrow$ Isocitrate.$3$. Isocitrate dehydrogenase: Isocitrate $\rightarrow$ $\alpha$-Ketoglutarate.$4$. $\alpha$-Ketoglutarate dehydrogenase: $\alpha$-Ketoglutarate $\rightarrow$ Succinyl-CoA.$5$. Succinyl-CoA synthetase: Succinyl-CoA $\rightarrow$ Succinate.$6$. Succinate dehydrogenase: Succinate $\rightarrow$ Fumarate.$7$. Fumarase: Fumarate $\rightarrow$ Malate.$8$. Malate dehydrogenase: Malate $\rightarrow$ Oxaloacetate.Thus,there are $8$ distinct enzymatic steps in the cycle.

The number of steps required for the complete oxidation of one molecule of pyruvic acid in the Krebs cycle is

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