Perfect 👍 Let’s start with Biology (40 Questions) for OAU Post-UTME practice.

📘 OAU Post-UTME Biology Practice Questions

(Answers with explanations are at the end, so you can test yourself first)

Questions
1. The structural and functional unit of life is?
A) Cell B) Tissue C) Organ D) Nucleus
2. Which of the following is NOT a characteristic of living organisms?
A) Respiration B) Growth C) Decay D) Excretion
3. The mode of nutrition in green plants is?
A) Saprophytic B) Holozoic C) Autotrophic D) Parasitic
4. In humans, fertilization usually occurs in the?
A) Uterus B) Ovary C) Fallopian tube D) Cervix
5. The organelle responsible for energy production in cells is?
A) Ribosome B) Lysosome C) Mitochondrion D) Nucleus
6. The green pigment responsible for photosynthesis is?
A) Chlorophyll B) Carotene C) Haemoglobin D) Xanthophyll
7. Which blood group is a universal donor?
A) A B) B C) AB D) O
8. In mammals, the organ for excretion of urea is?
A) Lungs B) Kidneys C) Skin D) Liver
9. Which of these is NOT a component of the mammalian circulatory system?
A) Heart B) Blood C) Lungs D) Blood vessels
10. Which of the following diseases is caused by a protozoan?
A) Tuberculosis B) Cholera C) Malaria D) Influenza
11. The longest bone in the human body is?
A) Femur B) Tibia C) Humerus D) Fibula
12. Which kingdom contains organisms that are multicellular, autotrophic and eukaryotic?
A) Animalia B) Plantae C) Protista D) Monera
13. The part of the plant responsible for water absorption is?
A) Root hairs B) Stem C) Leaves D) Flower
14. The genetic material of living organisms is?
A) DNA B) Protein C) Carbohydrate D) Lipid
15. The type of reproduction involving only one parent is called?
A) Asexual B) Sexual C) Binary fission D) Fertilization
16. Which part of the brain controls balance and posture?
A) Cerebrum B) Cerebellum C) Medulla D) Hypothalamus
17. What is the main function of red blood cells?
A) Blood clotting B) Oxygen transport C) Immunity D) Digestion
18. Which of the following organisms is an example of a vector?
A) Earthworm B) Mosquito C) Grasshopper D) Snail
19. Which process describes water loss from plant leaves?
A) Transpiration B) Photosynthesis C) Osmosis D) Respiration
20. The process by which organisms maintain a stable internal environment is?
A) Diffusion B) Homeostasis C) Osmosis D) Irritability
21. Which gas is released during photosynthesis?
A) Carbon dioxide B) Oxygen C) Nitrogen D) Methane
22. The sex of a child is determined by the?
A) Mother B) Father C) Both parents equally D) Environmental factors
23. Which organ secretes bile?
A) Pancreas B) Liver C) Gall bladder D) Stomach
24. The opening and closing of the stomata are controlled by?
A) Guard cells B) Root hairs C) Phloem D) Xylem
25. Which of the following is a communicable disease?
A) Rickets B) Diabetes C) Measles D) Hypertension
26. The functional unit of the kidney is?
A) Nephron B) Alveolus C) Neuron D) Glomerulus
27. What is the habitat of a hydra?
A) Fresh water B) Soil C) Salt water D) Air
28. Which vitamin prevents rickets?
A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D
29. The basic unit of heredity is?
A) Gene B) Chromosome C) DNA D) Nucleus
30. The organ of hearing in humans is the?
A) Nose B) Ear C) Eye D) Tongue
31. The enzyme that breaks down starch into maltose is?
A) Lipase B) Amylase C) Maltase D) Sucrase
32. Which of these blood vessels carries blood away from the heart?
A) Vein B) Artery C) Capillary D) Venule
33. Which of these is an example of excretion in plants?
A) Storage of starch B) Guttation C) Photosynthesis D) Pollination
34. Which type of skeleton is found in earthworm?
A) Endoskeleton B) Hydrostatic C) Exoskeleton D) Cartilaginous
35. The organ where mechanical and chemical digestion of food begins is?
A) Small intestine B) Mouth C) Stomach D) Oesophagus
36. Which hormone regulates blood sugar level?
A) Adrenaline B) Insulin C) Thyroxine D) Progesterone
37. Which of the following is a reflex action?
A) Reading B) Writing C) Knee-jerk D) Walking
38. The normal body temperature of humans is about?
A) 27°C B) 30°C C) 37°C D) 40°C
39. The exoskeleton of insects is made of?
A) Chitin B) Cellulose C) Protein D) Lignin
40. Which organelle packages and transports proteins in the cell?
A) Ribosome B) Golgi body C) Nucleus D) Lysosome
✨ Would you like me to drop the answers + explanations (1–40) now, or do you want to try
the questions first before checking?
Alright 👍 Here are the answers + explanations for the 40 Biology Post-
UTME questions:

✅ Biology Answers & Explanations

1. A – Cell

The cell is the basic structural and functional unit of life.

2. C – Decay

Decay occurs after death; it is not a characteristic of living organisms.

3. C – Autotrophic

Green plants manufacture their own food via photosynthesis.

4. C – Fallopian tube

Fertilization usually occurs in the fallopian tube in humans.

5. C – Mitochondrion

Known as the “powerhouse of the cell,” mitochondria produce ATP

(energy).

6. A – Chlorophyll

The green pigment in plants that captures light energy for photosynthesis.

7. D – O

Blood group O is a universal donor because it lacks A and B antigens.

 8. B – Kidneys

Kidneys excrete urea, excess water, and salts.

9. C – Lungs

The circulatory system includes the heart, blood, and blood vessels, but
not lungs.

10. C – Malaria

Malaria is caused by Plasmodium, a protozoan parasite.

11. A – Femur

The femur is the longest bone in the human body (thigh bone).

12. B – Plantae

Plants are multicellular, autotrophic, and eukaryotic.

13. A – Root hairs

Root hairs absorb water and minerals from the soil.

14. A – DNA

DNA carries genetic information in organisms.

15. A – Asexual

Asexual reproduction involves one parent only (e.g., binary fission in

amoeba).

16. B – Cerebellum

Controls balance, posture, and coordination of voluntary movements.

 17. B – Oxygen transport

Red blood cells (RBCs) transport oxygen using haemoglobin.

18. B – Mosquito

Mosquitoes are vectors of malaria and other diseases.

19. A – Transpiration

Loss of water vapour from leaves through stomata.

20. B – Homeostasis

Maintaining a stable internal environment in response to changes.

21. B – Oxygen

Photosynthesis releases oxygen as a by-product.

22. B – Father

The sex chromosome from the father (X or Y) determines the child’s sex.

23. B – Liver

The liver secretes bile, which emulsifies fats.

24. A – Guard cells

Guard cells control the opening and closing of stomata.

25. C – Measles

Measles is caused by a virus and is communicable.

26. A – Nephron

The nephron is the functional unit of the kidney responsible for filtration.
 27. A – Fresh water

Hydra is found in fresh water habitats.

28. D – Vitamin D

Prevents rickets by aiding calcium absorption for strong bones.

29. A – Gene

A gene is the basic unit of heredity.

30. B – Ear

The organ of hearing is the ear.

31. B – Amylase

Amylase breaks down starch into maltose.

32. B – Artery

Arteries carry blood away from the heart under high pressure.

33. B – Guttation

Excretion in plants includes removal of excess water (guttation) and

oxygen/CO₂.

34. B – Hydrostatic

Earthworms have hydrostatic skeletons supported by fluid pressure.

35. B – Mouth

Mechanical digestion (chewing) and chemical digestion (amylase) begin in

the mouth.
 36. B – Insulin

Insulin regulates blood sugar by lowering glucose levels.

37. C – Knee-jerk

A reflex action is an automatic response to a stimulus.

38. C – 37°C

Normal human body temperature is 37°C.

39. A – Chitin

Insects’ exoskeletons are made of chitin, a tough polysaccharide.

40. B – Golgi body

The Golgi body modifies, packages, and transports proteins.

✅ That’s Biology completed!

Would you like me to now prepare the 40 Chemistry questions before I

also drop their answers + explanations?