The fate of pyruvic acid during aerobic respiration is

Lactic acid fermentation

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Alcoholic fermentation

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Oxidative decarboxylation

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Oxidative phosphorylation

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Solution

The correct option is C Oxidative decarboxylation
During aerobic respiration, pyruvic acid which is formed during glycolysis enters the mitcohondrial matrix. It undergoes oxidative decarboxylation to produce ${C O}_{2}$ and NADH. The product combines with sulfur-containing co-enzyme A to form acetyl CoA. This reaction is catalyzed by an enzyme complex pyruvate dehydrogenase. This step is called link reaction or gateway step as it links glycolysis with Krebs' cycle.

$P y r u v i c a c i d + C O A + {N A D}^{+} M g^{2 +} - -------------- \to P y r u v a t e d e h y d r o g e n a s e A c e t y l C o A + {C O}_{2} + N A D H + H^{+}$
So the correct answer is 'Oxidative decarboxylation'.

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