POST UTME WELLSPRING UNIVERSITY 2025 Biology | Objective

Are you preparing for POST UTME WELLSPRING UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2025 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
Correct A. 0.36
B. 0.64
C. 0.72
D. 0.84

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1.0

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A diagram of the xylem and phloem tissues in a plant stem is shown below.
Correct A. The xylem tissue transports water and minerals from the roots to the leaves.
B. The phloem tissue transports sugars and other organic compounds from the leaves to the rest of the plant.
C. The xylem tissue transports sugars and other organic compounds from the leaves to the rest of the plant.
D. The phloem tissue transports water and minerals from the roots to the leaves.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A diagram of the human nervous system is shown below.
Correct A. The brain is responsible for proces\sing sensory information and controlling voluntary movements.
B. The spinal cord is responsible for transmitting nerve impulses from the brain to the rest of the body.
C. The brain is responsible for transmitting nerve impulses from the spinal cord to the rest of the body.
D. The spinal cord is responsible for proces\sing sensory information and controlling voluntary movements.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A diagram of the human respiratory system is shown below.
Correct A. The lungs are responsible for exchanging oxygen and carbon dioxide through the process of respiration.
B. The trachea is responsible for transporting air from the nose and mouth to the lungs.
C. The lungs are responsible for transporting air from the trachea to the rest of the body.
D. The trachea is responsible for exchanging oxygen and carbon dioxide through the process of respiration.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
Correct B. To pump protons across the mitochondrial inner membrane
C. To reduce NADH and FADH2 to NAD+ and FAD
D. To produce water and carbon dioxide as byproducts

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A patient with a rare genetic disorder has a mutation in the HFE gene, leading to an accumulation of iron in the body. Which of the following organs is most likely to be affected?
Correct A. Liver
B. Pancreas
C. Kidneys
D. Heart

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A researcher is studying the effects of light on plant growth. She uses a spectrophotometer to measure the absorbance of light by a sample of chlorophyll. What is the unit of measurement for the absorbance?
A. Absorbance units (AU)
Correct B. Optical density (OD)
C. Transmit\tance (T)
D. Reflec\tance (R)

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A patient has a severe case of diabetes mellitus and is experiencing symptoms of hyperglycemia. Which of the following hormones is most likely to be elevated?
A. Insulin
Correct B. Glucagon
C. Adrenaline
D. Cortisol

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A researcher is studying the effects of pH on enzyme activity. She uses a pH meter to measure the pH of a solution containing the enzyme. What is the unit of measurement for the pH?
Correct A. pH units (pH)
B. pH scale (pH)
C. pH range (pH)
D. pH value (pH)

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
Correct A. 180
B. 200
C. 220
D. 240

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is selectively permeable and has a permeability coefficient of 1.5 x 10^-6 cm/s for sucrose, what is the rate of sucrose efflux?
A. 7.5 x 10^-7 mol/cm^2/s
Correct B. 1.5 x 10^-6 mol/cm^2/s
C. 2.1 x 10^-6 mol/cm^2/s
D. 3.0 x 10^-6 mol/cm^2/s

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
A species of bird has a wing span of 1.5 m. If the bird flies at a speed of 50 km/h, what is the rate of energy exp\enditure?
A. 1.5 x 10^-3 J/s
Correct B. 3.0 x 10^-3 J/s
C. 4.5 x 10^-3 J/s
D. 6.0 x 10^-3 J/s

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A population of bacteria grows according to the equation N(t) = N0e^(kt), where N(t) is the population size at time t, N0 is the initial population size, and k is the growth rate. If the initial population size is 1000 and the growth rate is 0.2, what is the population size after 5 hours?
A. 1.1 x 10^6
Correct B. 1.2 x 10^6
C. 1.3 x 10^6
D. 1.4 x 10^6

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
A plant has a root system that ext\ends 2 m below the soil surface. If the soil density is 1.5 g/cm^3, what is the total weight of the soil in the root zone?
A. 3.0 x 10^4 g
B. 4.5 x 10^4 g
Correct C. 6.0 x 10^4 g
D. 7.5 x 10^4 g

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
In a photosynthetic organism, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplasts. Which of the following is the primary function of the light-indep\endent reactions?
A. To generate ATP and NADPH
Correct B. To synthesize glu\cose from CO2 and H2O
C. To produce oxygen as a byproduct
D. To regulate the Calvin cycle

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a thick peptidoglycan cell wall. Which of the following antibiotics would be most effective against this infection?
A. Penicillin
B. Erythromycin
C. Tetracycline
Correct D. Vancomycin

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
A diagram of the human eye is shown below. Which of the following structures is responsible for detecting light and s\ending signals to the brain?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for exchanging oxygen and carbon dioxide?
A. Trachea
B. Bronchi
C. Lungs
Correct D. Alveoli

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
A diagram of the human digestive system is shown below. Which of the following structures is responsible for absorbing nutrients into the bloodstream?
A. Mouth
B. Esophagus
C. Stomach
Correct D. Small intestine

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
A diagram of the human nervous system is shown below. Which of the following structures is responsible for transmitting signals from the brain to the muscles?
A. Brain
B. Spinal cord
Correct C. Nerve fibers
D. Muscles

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for pumping blood throughout the body?
A. Heart
B. Arteries
C. Veins
D. Capillaries

Correct Answer: VIEW ANSWER

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
Correct A. It catalyzes the conversion of CO2 to a 3-carbon molecule.
B. It is involved in the light-dep\endent reactions.
C. It is a key enzyme in the C4 pathway.
D. It is responsible for the regeneration of RuBP.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A diagram of the human eye is shown below. Identify the part labeled A.
Correct A. Cornea
B. Iris
C. Lens
D. Retina

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A cell is placed in a hypertonic solution. What will happen to the cell?
Correct A. It will swell and eventually burst.
B. It will shrink and eventually die.
C. It will remain unchanged.
D. It will grow and divide.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub:
Chat with Support