POST UTME COVENANT UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 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 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
Question 4
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 5
The diagram below shows a cross between two animals.
A. Tall animals with green fur
B. Short animals with green fur
C. Tall animals with yellow fur
D. Short animals with yellow fur
Question 6
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 7
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 8
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 9
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 10
A plant with the genotype AaBbCcc is crossed with a plant with the genotype AAbbCC. What is the probability that the offspring will have the genotype AaBbCc?
A. 1/8
B. 1/4
C. 1/2
D. 3/4
Question 11
The process of mitosis results in the production of daughter cells that are genetically identical to the parent cell. Which of the following is a characteristic of the daughter cells produced by mitosis?
A. Diploid
B. Haploid
C. Genetically identical
D. All of the above
Question 12
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what will be the concentration of sucrose in the cytosol after 10 minutes?
A. 0.4 M
B. 0.3 M
C. 0.2 M
D. 0.1 M
Question 13
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 14
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 15
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

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