Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to :
(a) ethanol
(b) carbon dioxide
(c) acetic acid
(d) lactic acid

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Solution

Muscular cramps may develop as a result of heavy exercise or fast running.
When muscle cell respire ANAEROBICALLY, there is partial break down of glucose and lactic acid. Accumulation of lactic acid causes muscle cramps.
Equation :(in absence of O2)

FOOD ( glucose) - - - - - - - > Latic acid + Energy
***********************************************
So correct option is D-- conversion of pyruvate into lactic acid.

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Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to : (a) ethanol (b) carbon dioxide (c) acetic acid (d) lactic acid

Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to :
(a) ethanol
(b) carbon dioxide
(c) acetic acid
(d) lactic acid