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PUTME Biology past questions.

1,324 real Post-UTME Screening questions from 2006 to 2025, every one with a worked solution. Practise them timed, on the web, on Android, or offline on desktop.

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Questions held
1,324
Years covered
20
Questions per paper
40
Time allowed
45 min
Try 5

Sample Biology questions, answered.

Taken straight from the papers below — one from each of the most recent years, with the answer marked and the reasoning written out.

PUTME Biology 2025 · Question 1
Which of the following is not a source of mutation in the body cell?
  1. Inversion
  2. Change in chromosome number
  3. Change in gene structure
  4. Gene strain — correct answer
Worked solution
Inversion, change in chromosome number and change in gene structure are all forms of mutation. 'Gene strain' is not a recognised source of mutation.
PUTME Biology 2024 · Question 1
When the environment is cold, the hairs of mammals stand on end to
  1. increase the surface area of the animal
  2. trap more air over the body surface and prevent heat loss — correct answer
  3. expel heat from the body of the mammal
  4. reduce the rate of sweating
Worked solution
Contraction of the erector pili muscles raises the hairs (piloerection), trapping a layer of insulating air over the skin which reduces heat loss.
PUTME Biology 2023 · Question 1
In the classification based on the kind of the teeth, one of the following is not correct
  1. Homodont
  2. Heterodont
  3. Acrodont — correct answer
  4. Isodont
Worked solution
By kind (shape) teeth are homodont/isodont (all alike) or heterodont (different kinds). Acrodont describes the mode of attachment of teeth to the jaw, not their kind.
PUTME Biology 2022 · Question 1
28 g of soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the dry soil?
  1. 22.2
  2. 55.6
  3. 75.0
  4. 25.0 — correct answer
  5. 35.7
Worked solution
Heating to constant weight removes water: dry soil = 24 g. Red-hot heating burns off humus: loss = 24−18=624 - 18 = 6 g. Percentage of humus in the dry soil = 624×100=25.0%\frac{6}{24} \times 100 = 25.0\%.
PUTME Biology 2021 · Question 1
Which of the following statements is NOT true of mammalian erythrocytes?
  1. They have haemoglobin
  2. They appear yellow when looked at singly
  3. They are disc-shaped
  4. The cells are more numerous than leucocytes
  5. They have nuclei at maturity — correct answer
Worked solution
Mature mammalian red blood cells lose their nuclei; they are biconcave discs containing haemoglobin, appear pale yellow singly and far outnumber white cells.
Every paper we hold

PUTME Biology, year by year.

2025
52 questions
2024
92 questions
2023
53 questions
2022
60 questions
2021
80 questions
2020
23 questions
2019
49 questions
2018
80 questions
2017
53 questions
2016
34 questions
2015
44 questions
2014
10 questions
2013
10 questions
2012
35 questions
2011
30 questions
2010
62 questions
2009
53 questions
2008
50 questions
2007
24 questions
2006
4 questions
Before you sit it

How PUTME Biology is set.

Post-UTME Screening sets 40 questions in Biology, answered in 45 minutes — about 68 seconds a question. Practising against that clock is the part most candidates skip, and it is the part that costs marks.

We hold 1,324 published Biology questions spanning 2006 to 2025. You can practise any single year’s paper, or sit a full timed mock that mirrors the real interface — the navigator, the flags and the auto-submit included.

Every question you get wrong comes back the next day, then at longer gaps until it sticks, and your home page leads with your weakest subjects.

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