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JAMB UTME 2015

JAMB Biology 2015 past questions

6 objective questions from the 2015 JAMB Biology paper. Answer each one, then reveal the answer and explanation.

All JAMB Biology past questions

  1. Question 1

    Cell biology

    Which organelle is the site of aerobic respiration in a cell?

    1. Option A: Nucleus
    2. Option B: Mitochondrion
    3. Option C: Ribosome
    4. Option D: Vacuole
    Show the answer to question 1

    Answer: B, Mitochondrion

    Aerobic respiration releases energy in the mitochondria.

  2. Question 2

    Genetics

    In garden peas, the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r). What is the expected phenotypic ratio of the offspring of a cross between Rr and rr parents?

    1. Option A: 3 round seeds : 1 wrinkled seeds
    2. Option B: 1 round seeds : 1 wrinkled seeds
    3. Option C: All round seeds
    4. Option D: All wrinkled seeds
    Show the answer to question 2

    Answer: B, 1 round seeds : 1 wrinkled seeds

    Rr × rr gives equal numbers of Rr and rr: 1 : 1.

  3. Question 3

    Nutrition

    Kwashiorkor is caused by a lack of

    1. Option A: carbohydrate
    2. Option B: protein
    3. Option C: vitamin A
    4. Option D: fat
    Show the answer to question 3

    Answer: B, protein

    Kwashiorkor is protein deficiency.

  4. Question 4

    Reproduction

    Germination in which the cotyledons are carried above the soil is

    1. Option A: hypogeal
    2. Option B: epigeal
    3. Option C: vivipary
    4. Option D: dormancy
    Show the answer to question 4

    Answer: B, epigeal

    In epigeal germination the hypocotyl lifts the cotyledons.

  5. Question 5

    Classification

    Which of the following animals is a fish?

    1. Option A: rat
    2. Option B: ostrich
    3. Option C: crocodile
    4. Option D: mudskipper
    Show the answer to question 5

    Answer: D, mudskipper

    The mudskipper is a fish (class Pisces).

  6. Question 6

    Excretion and respiration

    The build-up of lactic acid in muscles during hard exercise causes

    1. Option A: fever
    2. Option B: muscle fatigue
    3. Option C: thirst
    4. Option D: sweating
    Show the answer to question 6

    Answer: B, muscle fatigue

    Lactic acid makes muscles tire.

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