Lactate catalyses the conversion of pyruvate to lactic acid during short term anaerobic respiration.

carboxylase

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dehydrogenase

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oxidase

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phosphorylase

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Solution

The correct option is B dehydrogenase
In muscle cells, when there is a sudden surge in energy demands and low oxygen levels, the cells turn to short term anaerobic respiration to meet the demand. Cells use the enzyme lactate dehydrogenase to breakdown the pyruvic acid being produced from glucose into lactic acid and energy. This takes care of the immediate energy requirements of the cells.

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Question 33
Lack of oxygen in muscles often leads to cramps among cricketers. This happens due to

(a) Conversion of pyruvate to ethanol
(b) Conversion of pyruvate to glucose
(c) Non-conversion of glucose to pyruvate
(d) Conversion of pyruvate to lactic acid

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