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JAMB Biology 1980 Question 7

Question 7

Microorganisms and Health

Milk can be pasteurized by

  1. A.the addition of common salt
  2. B.boiling for one hour
  3. C.heating to 75°C for 20 minutes
  4. D.the addition vinegar
  5. E.heating to 100°C for 12 hours.
Show the answer and explanation

Answer: C (heating to 75°C for 20 minutes)

Explanation

Pasteurisation heats milk to a moderate temperature for a short time, killing most germs without boiling it.