POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 2
A certain species of bacteria doubles in population every 2 hours. If the initial population is 1000 cells, how many cells will there be after 6 hours?
A. 1000000
B. 2000000
C. 4000000
D. 8000000
Question 3
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 4
The process by which plants convert light energy into chemical energy is called
A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation
Question 5
A diagram of the human circulatory system is shown below. What is the primary function of the heart in this diagram?
A. To regulate blood pressure
B. To pump blood throughout the body
C. To regulate electrolyte balance
D. To control digestion
Question 6
A researcher is studying the effect of temperature on the rate of chemical reaction. The researcher measures the rate of reaction at different temperatures and plots the data on a graph. Which of the following statements is true about the graph?
A. The graph shows a positive correlation between temperature and rate of reaction.
B. The graph shows a negative correlation between temperature and rate of reaction.
C. The graph shows no correlation between temperature and rate of reaction.
D. The graph shows a non-linear relationship between temperature and rate of reaction.
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 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. 1.5 m/s
B. 2.5 m/s
C. 3.5 m/s
D. 4.5 m/s
Question 8
A 25-year-old woman presents with a 6-month history of recurrent episodes of abdominal pain. Her abdominal ultrasound shows a large ovarian cyst. What is the most likely diagnosis?
A. Ectopic pregnancy
B. Ovarian torsion
C. Ovarian cyst
D. Endometriosis
Question 9
A diagram of the human excretory system is shown below. What is the primary function of the kidneys in this diagram?
A. To regulate blood pressure
B. To filter waste from the blood
C. To regulate electrolyte balance
D. To control urine production
Question 10
In a typical plant cell, what is the primary function of the vacuole?
A. Storage of water and salts
B. Storage of sugars and other organic compounds
C. Regulation of cell growth and division
D. Transport of materials across the cell membrane
Question 11
A 40-year-old man presents with a 10-year history of progressive hearing loss. His audiogram shows a flat bone conduction threshold. What is the most likely diagnosis?
A. Noise-induced hearing loss
B. Presbycusis
C. Meniere's disease
D. Otosclerosis
Question 12
A 5-year-old child is brought to the doctor with symptoms of dehydration. The doctor orders a blood test to check the levels of sodium and potassium. What is the primary function of the kidneys in this scenario?
A. To regulate the levels of sodium and potassium in the blood
B. To remove excess water from the body
C. To produce hormones that stimulate thirst
D. To filter waste products from the blood
Question 13
A 30-year-old woman presents with primary amenorrhea. Her karyotype is 46,XX. What is the most likely cause of her condition?
A. Turner syndrome
B. Androgen insensitivity syndrome
C. Mayer-Roki\tansky-Küster-Hauser syndrome
D. Swyer syndrome
Question 14
A diagram of a plant cell is shown below. Identify the part labeled A.
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole
Question 15
In a typical angiosperm, what is the primary function of the xylem tissue in the vascular cylinder?
A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and other organic compounds from the leaves to the roots
C. Support and structure for the plant body
D. Storage of food and other nutrients

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