Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to:

When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of :

Which of the following is the correct sequence of air passage during inhalation?

During the deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in :

Which of the following statements are correct ?

(i) pyruvate can be converted into ethanol and carbon dioxide by yeast

(ii) fermentation takes place in the case of aerobic bacteria

(iii) fermentation takes place in mitochondria

(iv) fermentation is a form of anaerobic respiration