POST UTME WELLSPRING UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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
C. Nerve fibers
D. Muscles
Question 2
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
B. 1.2 x 10^6
C. 1.3 x 10^6
D. 1.4 x 10^6
Question 3
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
C. 6.0 x 10^4 g
D. 7.5 x 10^4 g
Question 4
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
B. 0.5
C. 0.75
D. 1.0
Question 5
In a eukaryotic cell, the process of cell division is initiated by the replication of DNA. Which of the following structures is responsible for replicating DNA?
A. Nucleus
B. Mitochondria
C. Endoplasmic reticulum
D. Ribosomes
Question 6
A diagram of the xylem and phloem tissues in a plant stem is shown below.
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.
Question 7
A 40-year-old female patient presents with symptoms of weight loss, fatigue, and abdominal pain. Her abdominal CT scan reveals a large mass in the pancreas. Which of the following is the most likely underlying cause of her condition?
A. Pancreatic cancer
B. Chronic pancreatitis
C. Pancreatic pseudocyst
D. Pancreatic neuro\endocrine tumor
Question 8
A diagram of the human eye is shown below. Identify the part labeled A.
A. Cornea
B. Iris
C. Lens
D. Retina
Question 9
A 30-year-old male patient presents with symptoms of polyuria, polydipsia, and weight loss. His blood glu\cose levels are elevated, and his urine specific gravity is low. Which of the following is the most likely underlying cause of his condition?
A. Diabetes mellitus type 1
B. Diabetes mellitus type 2
C. Insulin resis\tance
D. Pancreatic insufficiency
Question 10
The diagram below shows a cross-section of a nerve cell. Which of the following structures is responsible for the transmission of nerve impulses?
A. D\endrite
B. Axon
C. Nucleus
D. Mitochondria
Question 11
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
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.
Question 12
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
D. Alveoli
Question 13
A 35-year-old male patient presents with symptoms of fever, headache, and confusion. His cerebrospinal fluid (CSF) analysis reveals a high white blood cell count and a low glu\cose level. Which of the following is the most likely underlying cause of his condition?
A. Meningitis
B. Encephalitis
C. Brain abscess
D. Subarachnoid hemorrhage
Question 14
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
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
Question 15
A diagram of the human respiratory system is shown below.
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.

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