POST UTME IMS U 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a plant cell is shown below. If the cell is placed in a solution with a pH of 7.5, what is the expected effect on the cell membrane?
A. The cell membrane will become more permeable.
B. The cell membrane will become less permeable.
C. The cell membrane will remain unchanged.
D. The cell membrane will rupture.
Question 2
A species of animal has a reproductive strategy of semelparity. What does this mean?
A. The species reproduces only once in its lifetime
B. The species reproduces multiple times in its lifetime
C. The species has a high reproductive rate
D. The species has a low reproductive rate
Question 3
A 28-year-old male patient presents with a 3-month history of progressive weakness and fatigue. His physical examination reveals a 2-cm nodule on the right side of his thyroid gland. Which of the following hormones is most likely responsible for the development of this nodule?
A. Triiodothyronine (T3)
B. Thyroxine (T4)
C. Calcitonin
D. Parathyroid hormone
Question 4
A 35-year-old female patient undergoes a laparoscopic cholecystectomy. During the procedure, the surgeon notices that the patient's gallbladder is filled with a thick, greenish-yellow fluid. Which of the following tissues is most likely responsible for the production of this fluid?
A. Bile duct epithelium
B. Gallbladder mu\cosa
C. Pancreatic tissue
D. Liver parenchyma
Question 5
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for pumping blood from the heart to the lungs?
A. Pulmonary artery
B. Pulmonary vein
C. Aorta
D. Pulmonary valve
Question 6
A 25-year-old male patient presents with a 2-week history of fever, cough, and shortness of breath. His chest X-ray shows bilateral infiltrates. Which of the following microorganisms is most likely responsible for his symptoms?
A. Staphylococcus aureus
B. Klebsiella pneumoniae
C. Influenza virus
D. Mycoplasma pneumoniae
Question 7
A species of plant has a growth rate of 20% per year. If the initial population is 1000 plants, what will be the population after 5 years?
A. 10000
B. 2000
C. 4000
D. 5000
Question 8
In the context of evolutionary theories, what is the primary mechanism driving the process of speciation in allopatric populations?
A. Genetic drift
B. Gene flow
C. Natural selection
D. Mutation
Question 9
A diagram of the human eye is shown below. Which of the following structures is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 10
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 7
B. 9
C. 11
D. 13
Question 11
A 2.5-liter solution contains 1.8 liters of ethanol and 0.7 liters of water. What is the mole \fraction of ethanol in the solution?
A. 0.8
B. 0.7
C. 0.9
D. 0.6
Question 12
The diagram below shows the structure of a mitochondrion. What is the function of the cristae?
A. Protein synthesis
B. Energy production
C. Cell signaling
D. Cell division
Question 13
A cell is placed in a solution with a pH of 5.5. If the cell membrane has a permeability coefficient of 0.05 cm/s, what is the expected rate of proton entry into the cell?
A. 0.025 cm/s
B. 0.05 cm/s
C. 0.075 cm/s
D. 0.1 cm/s
Question 14
The process of photosynthesis occurs in the chloroplasts of plant cells and involves the conversion of light energy into chemical energy. Which of the following is a byproduct of photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Water
D. Glu\cose
Question 15
A researcher is studying the effects of pollution on a freshwater e\cosystem. Which of the following is a likely consequence of increased pollution?
A. Increased biodiversity due to the introduction of new species
B. Decreased primary production due to reduced light availability
C. Changes in community composition due to the loss of sensitive species
D. No significant impact on the e\cosystem

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