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JAMB Biology Past Questions 2022

10 questions from the JAMB 2022 Biology paper, with answers and explanations. Tap "Show answer" under each one when you are ready.

JAMB 2022Question 1 · Animal Biology and Comparative Physiology
The waste product of insects is?
  1. A.uric acid
  2. B.urine
  3. C.Mucilage
  4. D.sweat
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Answer: A. uric acid

Uric acid is the main nitrogenous waste product excreted by insects.

JAMB 2022Question 2 · Cell Biology and Biochemistry
The movement of Euglena towards the source of light is a?
  1. A.tropic movement
  2. B.tactic movement
  3. C.nastic movement
  4. D.kinetic movement
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Answer: B. tactic movement

The movement of Euglena towards light is a tactic movement (phototaxis), a whole-organism response toward or away from a stimulus.

JAMB 2022Question 3 · Classification
The body of a snail is divided into head?
  1. A.thorax and abdomen
  2. B.visceral mass and abdomen
  3. C.thorax and foot
  4. D.visceral mass and foot
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Answer: D. visceral mass and foot

The body of a snail is divided into a head, visceral mass, and foot.

JAMB 2022Question 4 · Ecology and Environment
Succession that occurs on an abandoned farm land is?
  1. A.tertiary
  2. B.secondary
  3. C.primary
  4. D.climax
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Answer: B. secondary

Succession on an abandoned farmland is secondary succession, as it begins on land that previously supported vegetation.

JAMB 2022Question 5 · Ecology and Environment
Tall trees with buttress roots and evergreen leaves are characteristics features of?
  1. A.temperate grass land
  2. B.Southern Guinea Savanna
  3. C.tropical rain forests
  4. D.Northern Guinea savanna
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Answer: C. tropical rain forests

Tall trees with buttress roots and evergreen leaves are characteristic features of tropical rain forests.

JAMB 2022Question 6 · Genetics and Evolution
When a colour blind woman marries a normal man, what is the probability of their son being colour blind?
  1. A.25%
  2. B.100%
  3. C.50%
  4. D.0%
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Answer: B. 100%

A colour-blind woman (XcbXcb) passes her Xcb chromosome to all sons, who receive Y from the father; thus 100% of sons will be colour blind.

JAMB 2022Question 7 · Genetics and Evolution
Pentadactyl plan of the fore limbs of frog, bird, horse, whale and man is a proof of?
  1. A.spontaneous generation
  2. B.evolution
  3. C.locomotion
  4. D.creation
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Answer: B. evolution

The pentadactyl limb plan shared by the fore limbs of frogs, birds, horses, whales, and man is evidence of common ancestry, supporting the theory of evolution.

JAMB 2022Question 8 · Mammalian Physiology and Anatomy
A universal recipient of blood belongs to blood group?
  1. A.O
  2. B.AB
  3. C.B
  4. D.A
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Answer: B. AB

Blood group AB individuals are universal recipients, able to receive blood from any ABO group.

JAMB 2022Question 9 · Plant Biology
Which of the following is associated with the dark stage of photosynthesis?
  1. A.Assimilation of Carbon(IV)oxide
  2. B.Photophosphorylation
  3. C.Photolysis
  4. D.Excitation of chlorophyll
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Answer: A. Assimilation of Carbon(IV)oxide

The dark stage (Calvin cycle) of photosynthesis involves the assimilation (fixation) of carbon (IV) oxide into organic compounds.

JAMB 2022Question 10 · Plant Biology
Conversion of atmosphere carbon into chemical bond energy occurs during the process of?
  1. A.transpiration
  2. B.photosynthesis
  3. C.digestion
  4. D.respiration
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Answer: B. photosynthesis

Photosynthesis converts atmospheric carbon (as CO2) into chemical bond energy stored in organic compounds.

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