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Solution


Q.

Which of the following statements are correct
(i) Pyruvate can be broken down into ethanol and carbon dioxide by yeast.
(ii) Fermentation takes place in aerobic bacteria.
(iii) Fermentation takes place in mitochondria.
(iv) Fermentation is a form of anaerobic respiration.
1 (i) and (iii)  
2 (ii) and (iv)  
3 (i) and (iv)  
4 (ii) and (iii)  

Ans.

(3)

Fermentation is an anaerobic process in which sugar is converted to acids or alcohol in the absence of oxygen. This process occurs in yeast, bacteria, and oxygen-depleted muscle cells in the same way that lactic acid fermentation does, but it takes place in the cytoplasm rather than in the mitochondria.