passwella.
Menu

JAMB Biology 2004 Question 18

Question 18

Respiration

The anaerobic fermentation of a glucose molecule yields

  1. A.38 ATP molecules
  2. B.2 ATP molecules and alcohol
  3. C.pyruvic acid and alcohol
  4. D.water and carbon (IV) oxide
Show the answer and explanation

Answer: B (2 ATP molecules and alcohol)

Explanation

Yeast fermentation turns one glucose molecule into alcohol and carbon(IV) oxide, with a net gain of only 2 ATP. Aerobic respiration gives about 38 ATP, water and carbon(IV) oxide.