POST UTME UNIOSUN 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process by which plants convert light energy into chemical energy is known as?
A. Respiration
B. Photosynthesis
C. Transpiration
D. Translocation
Question 2
A cell in interphase is preparing for DNA replication. What is the stage of the cell cycle at which this occurs?
A. G1
B. G2
C. S
D. M
Question 3
A 30-year-old woman is diagnosed with a rare disease characterized by an inability to synthesize a particular hormone. Which of the following is the most likely cause of this disease?
A. Mutation in the gene encoding the enzyme responsible for the hormone synthesis
B. Deletion of the gene encoding the enzyme responsible for the hormone synthesis
C. Inheri\tance of a recessive allele that codes for a non-functional enzyme
D. Infection with a virus that disrupts the gene encoding the enzyme
Question 4
The diagram below shows the structure of a mitochondrion. Which of the following is the function of the cristae?
A. Site of protein synthesis
B. Site of lipid synthesis
C. Site of electron transport
D. Site of ATP synthesis
Question 5
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?
A. 1600
B. 3200
C. 6400
D. 12800
Question 6
In the process of mitosis, what is the stage where the chromosomes condense and become visible under a microscope?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 7
A 2.5 kg object is moving at a speed of 4.0 m/s. What is its kinetic energy?
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 8
What is the primary function of the mitochondria in a cell?
A. Protein synthesis
B. Cell signaling
C. Energy production
D. Cell division
Question 9
In a population of 1000 individuals, 200 are heterozygous for a particular gene. If the gene is inherited in an autosomal dominant manner, what is the frequency of the dominant allele?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 10
In the context of cellular respiration, what is the primary function of the citric acid cycle?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2 for the electron transport chain
C. To synthesize glu\cose from non-carbohydrate sources
D. To oxidize fatty acids and produce acetyl-CoA
Question 11
In a photosynthetic pathway, which of the following is the primary acceptor of electrons in the light-dep\endent reactions?
A. P680
B. P700
C. Pheophytin
D. Plastocyanin
Question 12
A researcher is studying the effect of temperature on the growth of a particular microorganism. The researcher observes that the microorganism grows best at a temperature of 37°C. What is the most likely reason for this observation?
A. The microorganism has an optimal temperature for growth at 37°C
B. The microorganism has a temperature-dep\endent enzyme that is most active at 37°C
C. The microorganism has a temperature-dep\endent transport mechanism that is most active at 37°C
D. The microorganism has a temperature-dep\endent membrane structure that is most stable at 37°C
Question 13
A plant grows in a nutrient-poor soil. Which of the following is a likely adaptation of this plant?
A. Deep roots to access water
B. Large leaves to increase photosynthesis
C. Small leaves to reduce transpiration
D. Waxy stems to prevent water loss
Question 14
A 2-year-old child is diagnosed with a rare genetic disorder characterized by an inability to synthesize a particular amino acid. Which of the following is the most likely cause of this disorder?
A. Mutation in the gene encoding the enzyme responsible for the amino acid synthesis
B. Deletion of the gene encoding the enzyme responsible for the amino acid synthesis
C. Inheri\tance of a recessive allele that codes for a non-functional enzyme
D. Infection with a virus that disrupts the gene encoding the enzyme
Question 15
A 2-year-old child is experiencing symptoms of dehydration, including dry mouth and sunken eyes. The child's mother is concerned about the child's kidney function. What is the most likely cause of this condition?
A. Diarrhea
B. Vomiting
C. Kidney failure
D. Heart failure

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