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JAMB UTME 2017

JAMB Biology 2017 past questions

6 objective questions from the 2017 JAMB Biology paper. Answer each one, then reveal the answer and explanation.

All JAMB Biology past questions

  1. Question 1

    Classification

    Identify the bird among the following animals.

    1. Option A: whale
    2. Option B: tortoise
    3. Option C: penguin
    4. Option D: newt
    Show the answer to question 1

    Answer: C, penguin

    The penguin is a bird (class Aves).

  2. Question 2

    Transport

    Which blood vessel has valves and returns blood to the heart?

    1. Option A: Vein
    2. Option B: Artery
    3. Option C: Arteriole
    4. Option D: Capillary
    Show the answer to question 2

    Answer: A, Vein

    Veins have valves that stop backflow.

  3. Question 3

    Genetics

    In pea plants, the allele for tall (T) is dominant over the allele for short (t). What is the expected phenotypic ratio of the offspring of a cross between Tt and Tt parents?

    1. Option A: 1 tall : 1 short
    2. Option B: All tall
    3. Option C: 3 tall : 1 short
    4. Option D: All short
    Show the answer to question 3

    Answer: C, 3 tall : 1 short

    Tt × Tt gives three offspring with at least one T to every tt: 3 : 1.

  4. Question 4

    Genetics

    In humans, the allele for normal pigmentation (A) is dominant over the allele for albinism (a). What is the expected phenotypic ratio of the offspring of a cross between Aa and aa parents?

    1. Option A: 3 normal pigmentation : 1 albinism
    2. Option B: All normal pigmentation
    3. Option C: All albinism
    4. Option D: 1 normal pigmentation : 1 albinism
    Show the answer to question 4

    Answer: D, 1 normal pigmentation : 1 albinism

    Aa × aa gives equal numbers of Aa and aa: 1 : 1.

  5. Question 5

    Ecology

    Which bacteria convert nitrates in the soil to nitrogen gas?

    1. Option A: Denitrifying bacteria
    2. Option B: Nitrifying bacteria
    3. Option C: Nitrogen-fixing bacteria
    4. Option D: Putrefying bacteria
    Show the answer to question 5

    Answer: A, Denitrifying bacteria

    Denitrifying bacteria release nitrogen gas.

  6. Question 6

    Cell biology

    Which part of the cell controls all its activities?

    1. Option A: Cytoplasm
    2. Option B: Vacuole
    3. Option C: Nucleus
    4. Option D: Cell wall
    Show the answer to question 6

    Answer: C, Nucleus

    The nucleus holds the genetic material that directs the cell.

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