Biology Exam Past Questions and Answers | JAMB, WAEC and NECO

Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.

• Question 21: In a Biuret test , some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive result? Options:
  A) mercurous nitrate
  B) copper sulphate
  C) sodium carbonate
  D) silver nitrate
  Show Answer
  The correct answer is B .
• Question 22: The joint between the femur and tibia is known as ________? Options:
  A) hinge joint
  B) ball-and-socket joint
  C) pivot joint
  D) gliding joint
  Show Answer
  The correct answer is A .
• Question 23: In man, identical twins occur when Options:
  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
  Show Answer
  The correct answer is A .
• Question 24: If a tall man (TT) maries a dwarf woman (gg) and they have four male children, the offspring will be Options:
  A) All short
  B) Three short and one tall
  C) Two short and two tall
  D) One short and three tall
  E) All tall
  Show Answer
  The correct answer is E .
• Question 25: Soil micro-organisms are beneficial because of their involvement in Options:
  A) photosynthesis
  B) translocation
  C) cycling of nutrients
  D) respiration using soil air
  Show Answer
  The correct answer is C .
• Question 26: Which of the following characters is NOT sex-linked? Options:
  A) Albinism
  B) Baldness
  C) Haemophilia
  D) Colour blindness
  Show Answer
  The correct answer is A .
• Question 27: The chitin in the exoskeleton of many arthropods is strengthened by Options:
  A) lids
  B) proteins
  C) calcium compounds
  D) organic salt
  Show Answer
  The correct answer is C .
• Question 28: A pollutant that is mostly associated with acid rain is Options:
  A) Nitrogen (IV) Oxide
  B) Ozone
  C) Fluorine
  D) Carbon (IV) Oxide
  Show Answer
  The correct answer is A .
• Question 29: Monocot stem differ from dicot stems in that monocot have Options:
  A) no cambium
  B) no pith
  C) fewer vascular bundles
  D) phloems with parenchyma
  Show Answer
  The correct answer is A .
• Question 30: The vitamin which is important in the formation of the retina pigment is Options:
  A) vitamin A
  B) vitamin B
  C) vitamin C
  D) vitamin D
  Show Answer
  The correct answer is A .