POST UTME OAU 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 40-year-old man presents with a 5-year history of hypertension. His physical examination reveals a blood pressure of 180/100 mmHg. What is the most likely cause of his hypertension?
A. Renal artery stenosis
B. Coarctation of the aorta
C. Pheochromocytoma
D. Primary aldosteronism
Question 2
The tissue type that is composed of a mixture of epithelial, connective, muscle, and nervous tissue is known as
A. Connective tissue
B. Epithelial tissue
C. Muscle tissue
D. Mesenchyme
Question 3
A 2-year-old child is brought to the hospital with symptoms of malabsorption. The child's stool is pale and bulky. Which of the following enzymes is most likely deficient?
A. Lactase
B. Sucrase
C. Maltase
D. Amylase
Question 4
The nervous system's coordination of muscle contractions and relaxations is primarily regulated by the
A. Sympathetic nervous system
B. Parasympathetic nervous system
C. Motor neurons
D. Muscle spindles
Question 5
The xylem transports
A. Water and minerals
B. Sugars and amino acids
C. Oxygen and carbon dioxide
D. Hormones and waste products
Question 6
A diagram of the human eye is shown below. Which of the following is the primary function of the lens?
A. To focus light on the retina
B. To produce tears for lubrication
C. To regulate the amount of light entering the eye
D. To detect color
Question 7
A researcher is studying the effect of temperature on the rate of a chemical reaction. The researcher measures the rate of the reaction at different temperatures and plots the data on a graph. Which of the following types of graphs would best represent the data?
A. A scatter plot
B. A line graph
C. A bar chart
D. A histogram
Question 8
A diagram of a typical terrestrial e\cosystem is shown below. Which of the following organisms would be most likely to be a primary consumer?
A. Herbivore B
B. Carnivore C
C. Decomposer D
D. Primary Producer A
Question 9
A 5% solution of glu\cose in water is mixed with a 10% solution of glu\cose in water. What is the concentration of the resulting solution?
A. 6.25%
B. 7.5%
C. 8.33%
D. 9.09%
Question 10
The microorganism responsible for cau\sing tuberculosis is
A. Escherichia coli
B. Staphylococcus aureus
C. Mycobacterium tuberculosis
D. Salmonella typhi
Question 11
A 25-year-old woman presents with a 2-year history of infertility. Her physical examination reveals a normal secondary sexual characteristic development, but her pelvic examination shows a normal-sized uterus. What is the most likely diagnosis?
A. Polycystic ovary syndrome
B. Endometriosis
C. Tubal ligation
D. Premature ovarian failure
Question 12
In the context of respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from glu\cose
B. To break down glu\cose into pyruvate
C. To produce NADH and FADH2 from glycolysis
D. To convert pyruvate into acetyl-CoA
Question 13
A bio\logist is studying the population dynamics of a species of rabbit. The population grows according to the \logistic growth model: \( \frac{dP}{dt} = rP \left\( 1 - \frac{P}{K} \right \). If the initial population is 100, the carrying capacity is 1000, and the growth rate is 0.5, what is the population after 5 years?
A. 500
B. 750
C. 900
D. 1000
Question 14
A 2.5 L flask contains 1.5 atm of O2 at 298 K. If 0.5 atm of O2 is released, what is the partial pressure of O2 remaining in the flask?
A. 0.5 atm
B. 1.0 atm
C. 1.5 atm
D. 2.0 atm
Question 15
In a population of 1000 individuals, 20% are heterozygous for a particular gene, while 80% are homozygous recessive. If the population is randomly mated, what is the expected frequency of the heterozygous genotype in the offspring?
A. 0.25
B. 0.30
C. 0.35
D. 0.40

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