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WAEC Biology 1997 Question 7

Question 7

Respiration

Which of the following is a product of brewing when yeast is used as a fermenting agent?

  1. A.Nitrogen
  2. B.Oxygen
  3. C.Malt
  4. D.Ethanol
  5. E.Sucrose and glucose
Show the answer and explanation

Answer: D (Ethanol)

Explanation

Yeast ferments sugar into ethanol (alcohol) and carbon dioxide.