Question

Assertion : Fermentation is the incomplete oxidation of glucose into lactic acid or ethanol.
Reason : It takes place under anaerobic conditions in prokaryotes only.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (C)

Fermentation is the incomplete oxidation of glucose under anaerobic conditions. In yeast (eukaryote) the pyruvic acid is converted to $C{O}_2$ and ethanol. Other organisms like some bacteria produce lactic acid from pyruvic acid. In animal cells also, like muscles during exercise when oxygen is inadequate for cellular respiration pyruvic acid is reduced to lactic acid by lactate dehydrogenase. Fermentation takes place under anaerobic conditions in many prokaryotes, unicellular eukaryotes and in germinating seeds.