POST UTME UNIOSUN 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 1.5 L solution of 0.2 M NaCl is diluted to 3 L. What is the new concentration of NaCl?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 2
A 30-year-old woman presents with a 2-year history of infertility. Her husband has a normal semen analysis. Which of the following is the most likely cause of her infertility?
A. Polycystic ovary syndrome (PCOS)
B. Endometriosis
C. Tubal ligation
D. Premature ovarian failure
Question 3
In a population of rabbits, the frequency of the dominant allele for fur color is 0.6, while the frequency of the recessive allele is 0.4. What is the expected frequency of the heterozygous genotype in the population?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 4
A diagram of a human respiratory system is shown below. What is the function of the structure labeled 'B'?
A. Exchange of oxygen and carbon dioxide
B. Filtering of blood
C. Production of mucus
D. Regulation of body temperature
Question 5
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 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the Hardy-Weinberg principle is applied, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.16
D. 0.44
Question 7
In a population of 1000 individuals, the frequency of the dominant allele is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?
A. 0.4
B. 0.2
C. 0.8
D. 0.1
Question 8
A patient presents with symptoms of a bacterial infection. Which of the following is a characteristic feature of bacterial cell walls?
A. The presence of a nuclear membrane
B. The presence of a cell wall composed of peptidoglycan
C. The presence of flagella
D. The presence of a large amount of cytoplasm
Question 9
In a population of 1000 individuals, 80% are heterozygous for the ABO blood group system, 15% are homozygous dominant, and 5% are homozygous recessive. What is the expected frequency of the recessive allele?
A. 0.05
B. 0.10
C. 0.15
D. 0.20
Question 10
In a eukaryotic cell, the \endoplasmic reticulum (ER) is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is true about the ER?
A. The ER is a type of organelle found in prokaryotic cells.
B. The ER is responsible for the synthesis of proteins that are destined for use within the cell.
C. The ER is involved in the synthesis of proteins that are destined for secretion.
D. The ER is a type of organelle found in both prokaryotic and eukaryotic cells.
Question 11
In a freshwater e\cosystem, what is the primary source of energy for the food chain?
A. Grass
B. Plankton
C. Zooplankton
D. Phytoplankton
Question 12
A diagram of the human reproductive system is shown below. What is the function of the epididymis?
A. To store sperm before ejaculation
B. To transport sperm from the testes to the penis
C. To produce sperm
D. To regulate the temperature of the testes
Question 13
A diagram of a plant's reproductive system is shown below. What is the function of the part labeled 'C'?
A. Receiving pollen
B. Relea\sing pollen
C. Receiving water and nutrients
D. Relea\sing seeds
Question 14
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To detect light intensity
C. To regulate pupil size
D. To produce tears
Question 15
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through the process of chemiosmosis
B. To produce NADH and FADH2
C. To oxidize glu\cose
D. To reduce oxygen

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