Question

Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzymes

• A. carboxylase
• B. phosphatase
• C. dehydrogenase
• D. decarboxylase and dehydrogenase

Answer 1

Answer: (D)

decarboxylase and dehydrogenase

Answer 2

Conversion of pyruvic acid into ethyl alcohol is an example of .anaerobic respiration i.e. ethyl alcohol fermentation. it occurs in some organisms sud, as fungi (e.g., Rhizopus, yeast) and bacteria. In the presence of pyruvate decarboxylase and TPP (thiamine pyrophosphate); pyruvic acid is broken down to form acetaldehyde. Carbon dioxide is released.
${ Pyruvic acid = ->[ {Pyruvate\, decarboxylase}][ {TPP . Mg^{2+}}] Acetaldehyde +CO_2(^) }$
Acetaldehyde is reduced to ethyl alcohol (or ethanol) by alcohol dehydrogenase.
${ Aceta ehy e + NADH = ->[ {Alcohol}][ {dehydrogenase}] C_2H_5OH + NAD^+}$