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Tuesday, 23 June 2026
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Biology Past Questions and Answers

Biology Questions

Question 266:
Refrigeration, as a method of preservation, has ONE of the following characteristics:
  • A Kills all the bacteria
  • B Kill most of the bacteria
  • C Makes the bacteria inactive
  • D Dries food
  • E Hydrolyses food
View Answer & Explanation
Question 267:
Treatment of a poor soil with lime supplies
  • A Sulphur
  • B Calcium
  • C Phosphorus
  • D Sodium
  • E Nitrogen
View Answer & Explanation
Question 268:
In the enzyme (amlyase) reactions of starch → sugar<br/>starch is referred to as the
  • A Substrate
  • B Product
  • C Enzyme
  • D Enzyme-substrate complex
  • E Reaction mixture
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Question 269:
ONE of the major causes of haemophilia is lack of
  • A Firbrinogen
  • B Amylase
  • C White blood corpuscles
  • D Red blood corpuscles
  • E Plasma
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Question 270:
In man, identical twins occur when
  • A An ovum is fertilized by a sperm and then divide into two, each forming a separate embryo
  • B An ovum fertilized by two sperms and then divides into two, each forming an embryo
  • C Two ova are fertilized at the same tine each forming an embryo
  • D Two ova are fertilized by a single sperm each forming an embryo after fertilization
  • E One ovum first divides into two and each half is fertilized by a sperm before developing into an embryo
View Answer & Explanation