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JAMB Biology Past Questions 2013

10 questions from the JAMB 2013 Biology paper, with answers and explanations. Tap "Show answer" under each one when you are ready.

JAMB 2013Question 1 · Cell Biology and Biochemistry
The process in which complex substances are broken down into simpler ones is referred to as
  1. A.anabolism
  2. B.catabolism
  3. C.metabolism
  4. D.tropism
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Answer: B. catabolism

Catabolism is the breakdown of complex substances into simpler ones, releasing energy.

JAMB 2013Question 2 · Ecology and Environment
Which of the following distinguishes a butterfly from a moth?
  1. A.the wings of butterfly rest horizontally but those of moth rest vertically
  2. B.Both are active during the day
  3. C.they have similar antennae
  4. D.the abdomen of moth is fatter than that of butterfly
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Answer: D. the abdomen of moth is fatter than that of butterfly

Moths generally have fatter, hairier abdomens compared to the more slender abdomen of butterflies.

JAMB 2013Question 3 · Ecology and Environment
The chitin in the exoskeleton of many arthropods is strengthened by
  1. A.lids
  2. B.proteins
  3. C.calcium compounds
  4. D.organic salt
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Answer: C. calcium compounds

Chitin in the exoskeleton of many arthropods (especially crustaceans) is strengthened/hardened by calcium compounds.

JAMB 2013Question 4 · Ecology and Environment
The special pigment for colour change in chameleon is
  1. A.melanin
  2. B.carotenoid
  3. C.chromatin
  4. D.chromatophore
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Answer: D. chromatophore

Chromatophores are the special pigment-containing cells responsible for colour change in chameleons.

JAMB 2013Question 5 · Mammalian Physiology and Anatomy
Which blood cell are involved in the immune response of vertebrates?
  1. A.Phagoecytes
  2. B.lymphocytes
  3. C.erythrocytes
  4. D.monocytes
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Answer: B. lymphocytes

Lymphocytes are the white blood cells primarily involved in the immune response of vertebrates.

JAMB 2013Question 6 · Mammalian Physiology and Anatomy
The main structure in vertebrates that supports and protects the body is the
  1. A.skeleton
  2. B.ligament
  3. C.muscle
  4. D.joint
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Answer: A. skeleton

The skeleton is the main structure supporting and protecting the vertebrate body.

JAMB 2013Question 7 · Mammalian Physiology and Anatomy
The clumping together of red blood cells is
  1. A.agglutination
  2. B.fussion
  3. C.transfusion
  4. D.compatibility
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Answer: A. agglutination

Agglutination is the clumping together of red blood cells, typically due to antigen-antibody reactions.

JAMB 2013Question 8 · Microbiology and Disease
During the manufacture of food by plants, which of the following organism use energy from the sun?
  1. A.anabaena
  2. B.sulfur bacteria
  3. C.nitrosomonas sp
  4. D.nitrobacter sp
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Answer: A. anabaena

Anabaena, a photosynthetic cyanobacterium, uses solar energy to manufacture food, unlike the chemosynthetic bacteria listed.

JAMB 2013Question 9 · Plant Biology
The plants that grow in deserts or very dry areas are referred to as
  1. A.mesophytes
  2. B.hydrophytes
  3. C.epiphytes
  4. D.xerophytes
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Answer: D. xerophytes

Xerophytes are plants adapted to grow in deserts or very dry areas.

JAMB 2013Question 10 · Plant Biology
The transfer of pollen grains from the anther to a sigma is
  1. A.propagation
  2. B.placentation
  3. C.pollination
  4. D.fertilization
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Answer: C. pollination

Pollination is the transfer of pollen grains from the anther to the stigma.

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