POST UTME SUMMIT UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of bacteria is growing exponentially. If the initial population is 100 and the growth rate is 20% per hour, what will be the population after 5 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 2
In the context of gas exchange, what is the primary function of the alveolar-capillary membrane?
A. To facilitate the diffusion of oxygen into the bloodstream
B. To regulate the pH of the blood
C. To remove carbon dioxide from the blood
D. To produce surfac\tant for lung expansion
Question 3
The diagram below represents a phy\logenetic tree. Identify the common ancestor of species A and B.
A. Species A
B. Species B
C. Common Ancestor
D. Species C
Question 4
A 2-year-old child is diagnosed with acute lymphoblastic leukemia (ALL). Which of the following is a common genetic abnormality associated with this disease?
A. t(9;22)
B. t(15;17)
C. t(8;14)
D. t(4;11)
Question 5
A researcher is studying the effect of temperature on the growth of Saccharomyces cerevisiae (baker's yeast). The researcher measures the growth of yeast at different temperatures and plots the data on a graph. What is the expected shape of the graph?
A. Sigmoid
B. Linear
C. Exponential
D. Logarithmic
Question 6
A 0.5 L flask contains 0.05 mol of a gas at 37°C. If the volume of the flask is doubled, what is the new pressure?
A. 0.5 atm
B. 1.0 atm
C. 1.5 atm
D. 2.0 atm
Question 7
In the context of sexual reproduction, what is the primary function of the sperm's acrosome?
A. To provide energy for the sperm
B. To facilitate sperm motility
C. To penetrate the egg's zona pellucida
D. To regulate sperm-egg fusion
Question 8
A plant cell is undergoing cell division. The chromosomes are attached to the spindle fibers, and the nuclear envelope is \beginning to break down. What is the stage of cell division that the plant cell is currently in?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 9
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. 0.84
Question 10
A patient has a blood sample with a white blood cell count of 10,000 cells/μL. If the normal range for white blood cell count is 4,000-11,000 cells/μL, what is the percentage of the patient's white blood cell count that is above the normal range?
A. 25%
B. 50%
C. 75%
D. 90%
Question 11
A person has a visual acuity of 6/60 in the right eye. What is the primary function of the fovea in the retina?
A. To detect movement and changes in brightness
B. To detect colors and fine details
C. To regulate the pupil size
D. To produce tears for lubrication
Question 12
A 30-year-old woman is diagnosed with a rare genetic disorder called Fabry disease. Which of the following enzymes is deficient in this disease?
A. Alpha-galactosidase A
B. Beta-galactosidase
C. Alpha-glu\cosidase
D. Beta-glu\cosidase
Question 13
A researcher is studying the evolution of a particular trait in a population of  E. coli  bacteria. The trait is controlled by a \single gene with two alleles: one that codes for a dark-colored colony and one that codes for a light-colored colony. The population is initially fixed for the dark-colored allele, but a mutation occurs that introduces the light-colored allele. What is the expected frequency of the light-colored allele in the population after one generation of random mating?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 14
A geneticist is studying the inheri\tance of a particular trait in a family. The trait is controlled by a \single gene with two alleles: one that codes for a dominant phenotype and one that codes for a recessive phenotype. The geneticist has collected data on the genotypes and phenotypes of the family members and has constructed a Punnett square to predict the genotypes and phenotypes of the offspring. What is the probability that an offspring will be homozygous recessive for the gene?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 15
A diagram of a mitotic spindle is shown below. What is the function of the part labeled 'B'?
A. To separate chromosomes during mitosis
B. To attach chromosomes to the spindle fibers
C. To break down the nuclear envelope
D. To synthesize microtubules

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