POST UTME UNILORIN 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 2
The human respiratory system is responsible for the exchange of gases between the environment and the body. Which of the following is the primary function of the diaphragm in the respiratory system?
A. To expand the chest cavity
B. To contract the chest cavity
C. To regulate body temperature
D. To produce red blood cells
Question 3
The diagram below represents a cross between two true-breeding lines of maize. What is the probability that a progeny plant will be tall?
A. 0.5
B. 0.75
C. 0.25
D. 0.33
Question 4
A certain type of rock has a density of 2.5 g/cm^3. If a sample of this rock has a mass of 50 g, what is its volume?
A. 20 cm^3
B. 25 cm^3
C. 30 cm^3
D. 35 cm^3
Question 5
The respiratory system is responsible for the exchange of gases between the environment and the body. Which of the following is the primary function of the alveoli in the lungs?
A. To exchange oxygen and carbon dioxide
B. To regulate body temperature
C. To produce red blood cells
D. To filter waste products
Question 6
A diagram of the human brain is shown below. Which part of the brain is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord
Question 7
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.15 m from its equilibrium position and released from rest. What is the speed of the block when it passes through the equilibrium position?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 8
In a population of 1000 individuals, 60% are homozygous dominant (BB), 30% are heterozygous (Bb), and 10% are homozygous recessive (bb). If a random sample of 20 individuals is taken, what is the probability that at least 2 of them will be homozygous recessive?
A. 0.15
B. 0.25
C. 0.35
D. 0.45
Question 9
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To categorize organisms based on their genetic makeup
C. To classify organisms based on their body symmetry
D. To group organisms based on their metabolic processes
Question 10
In the context of microorganisms and diseases, what is the primary function of the immune system?
A. To produce antibodies to fight infection
B. To regulate the amount of white blood cells
C. To stimulate the release of hormones
D. To regulate body temperature
Question 11
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'B'?
A. To exchange oxygen and carbon dioxide
B. To regulate the amount of air entering the lungs
C. To produce mucus to lubricate the airways
D. To detect changes in air pressure
Question 12
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'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 13
A person has a growth hormone deficiency. Which of the following is a possible effect of this deficiency?
A. The person grows taller than average
B. The person grows shorter than average
C. The person grows at a normal rate
D. The person's growth rate is unaffected
Question 14
The human kidney is responsible for the regulation of electrolyte balance in the body. Which of the following is the primary mechanism by which the kidney regulates sodium levels in the blood?
A. Active transport
B. Passive transport
C. Osmosis
D. Diffusion
Question 15
A diagram of the human heart is shown below. Which part of the heart pumps blood to the lungs?
A. Right Ventricle
B. Left Ventricle
C. Right Atrium
D. Left Atrium

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