POST UTME COVENANT UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The diagram below shows a cross-section of a human brain. Identify the part labeled 'C' in the diagram.
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord
Question 2
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. No natural selection
Question 3
A 1.0 L solution of 0.5 M NaCl is mixed with a 1.0 L solution of 0.5 M NaCl. What is the concentration of NaCl in the resulting solution?
A. 0.5 M
B. 0.75 M
C. 1.0 M
D. 1.25 M
Question 4
The diagram below shows a cross-section of a human eye. Identify the part labeled 'B' in the diagram.
A. Cornea
B. Iris
C. Lens
D. Retina
Question 5
A cell has a membrane potential of -70 mV. If the cell is depolarized by 10 mV, what is the new membrane potential?
A. -60 mV
B. -65 mV
C. -70 mV
D. -75 mV
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. 1
B. 7
C. 10
D. 14
Question 7
The diagram below shows a cross-section of a human heart. Identify the part labeled 'D' in the diagram.
A. Atrium
B. Ventricle
C. Septum
D. Valve
Question 8
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 'RR'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 9
A 2.5 g sample of a compound containing only carbon, hydrogen, and oxygen is analyzed by combustion. The amount of CO2 produced is 1.2 g, and the amount of H2O produced is 0.5 g. What is the empirical formula of the compound?
A. C2H4O
B. C3H6O2
C. C4H8O3
D. C5H10O4
Question 10
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. site of protein synthesis
B. site of lipid synthesis
C. site of carbohydrate synthesis
D. site of nucleic acid synthesis
Question 11
A diagram of a simple harmonic oscillator is shown below. What is the frequency of the oscillator?
A. 1 Hz
B. 2 Hz
C. 3 Hz
D. 4 Hz
Question 12
The diagram below shows a cross-section of a plant root. Identify the type of tissue labeled 'A' in the diagram.
A. Parenchyma
B. Collenchyma
C. Sclerenchyma
D. Xylem
Question 13
The diagram below shows a cross between two pea plants.
A. Tall plants with green pods
B. Short plants with green pods
C. Tall plants with yellow pods
D. Short plants with yellow pods
Question 14
The nervous system of an organism is responsible for transmitting signals from the sense organs to the brain. Which of the following is NOT a type of sense organ?
A. Eye
B. Ear
C. Mouth
D. Skin
Question 15
A 2.0 L solution of 0.1 M glu\cose is diluted to 5.0 L. What is the new concentration of glu\cose?
A. 0.02 M
B. 0.04 M
C. 0.06 M
D. 0.08 M

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