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Question : What are the chemical changes in a pyruvic acid molecule before it enters mitochondria ?

Answer»

Solution :PYRUVIC acid undergoes oxidative decarboxylation in which pyruvic acid first loses one `CO_(2)` molecule and then undergoes oxidation in PRESENCE of enzyme dehydrogenase to form acetyl CoA.
(i)PGA is formed during oxygenation of RUBP in the chloroplast or is formed by formation of glycerate in the presence of ATP. PGA molecule ENTER the Calvin cycle to form carbohydrate.
(ii) Glycine is formed by amination of glycoxylate in peroxisome and then enters the mitochondria, where two glycine molecules combine to form serine and `CO_(2)`.


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