Read the following Assertion and Reason and choose the correct option. Assertion: In animal cells, like muscles during exercise, pyruvic acid is reduced to lactic acid by lactate dehydrogenase. Reason: During excercise the muscles receive inadequate supply of oxygen and respire anaerobically

Step-by-step solution

In animal cells, like muscles during exercise, when oxygen is inadequate for cellular respiration pyruvic acid is reduced to lactic acid by lactate dehydrogenase. In both lactic acid an alcohol fermentation not much energy is released; less than seven per cent of the energy in glucose is released and not all of it is trapped as high energy bonds of ATP.