POST UTME UNIPORT 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of humans, the frequency of the gene 'B' is 0.6. If the population size is 1000, what is the expected number of individuals that do not have the gene 'B'?
A. 400
B. 600
C. 800
D. 1000
Question 2
In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining acid-base balance?
A. To regulate the concentration of ions in the blood
B. To remove excess hydrogen ions from the body
C. To maintain the pH of the blood
D. To regulate the concentration of glu\cose in the blood
Question 3
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. Regulation of light entry
B. Focus of light rays
C. Production of tears
D. Maintenance of eye pressure
Question 4
A genetic cross is performed between two pea plants, one with the genotype TT and the other with the genotype tt. What is the probability that the offspring will have the genotype Tt?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 5
A 1000 L \tank contains 500 L of water and 500 L of air. If 200 L of water is added, what is the new concentration of water in the \tank?
A. 0.6
B. 0.7
C. 0.8
D. 0.9
Question 6
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 7
B. 8
C. 9
D. 10
Question 7
A cell is in the G2 phase of the cell cycle. Which of the following statements is true about the cell?
A. The cell is preparing for mitosis.
B. The cell is in the S phase.
C. The cell is in the G1 phase.
D. The cell is in the G2 phase.
Question 8
The diagram below shows a cross between two E. coli individuals. What is the probability that the offspring will be homozygous recessive?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 9
In a population of E. coli, the frequency of the gene 'A' is 0.8. If the population size is 1000, what is the expected number of individuals that do not have the gene 'A'?
A. 200
B. 400
C. 600
D. 800
Question 10
A diagram of a human eye is shown below. Which of the following structures is responsible for detecting light?
A. A
B. B
C. C
D. D
Question 11
A population of bacteria is growing exponentially with a growth rate of 0.05/h. If the initial population is 100 cells, what is the population after 2 hours?
A. 200 cells
B. 400 cells
C. 600 cells
D. 800 cells
Question 12
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. Storage of nutrients
B. Transport of water and minerals
C. Production of hormones
D. Regulation of water potential
Question 13
The diagram below represents a simple circuit. What is the total resis\tance of the circuit?
A. 2Ω
B. 4Ω
C. 6Ω
D. 8Ω
Question 14
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 3 hours?
A. 1600
B. 2000
C. 2500
D. 3000
Question 15
The diagram below shows a cross between two Drosophila melanogaster individuals. What is the probability that the offspring will be homozygous dominant?
A. 0.25
B. 0.5
C. 0.75
D. 1

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