POST UTME EKSU 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of genetic variation that occurs when a gene is duplicated and the duplicate copy is mutated is known as?
A. Gene duplication
B. Gene mutation
C. Gene deletion
D. Gene amplification
Question 2
The sense organ responsible for detecting changes in sound waves is the?
A. Eye
B. Ear
C. Nose
D. Tongue
Question 3
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. To store water and salts
B. To synthesize proteins
C. To generate energy through cellular respiration
D. To carry out photosynthesis
Question 4
A 2.5 cm long xylem vessel has a diameter of 0.5 mm. If the vessel is filled with water at 20°C, what is the pressure exerted by the water column?
A. 1000 Pa
B. 2000 Pa
C. 3000 Pa
D. 4000 Pa
Question 5
A population of bacteria is growing in a culture medium. The growth rate of the population is proportional to the product of the current population size and the amount of available nutrients. If the initial population size is 100 bacteria and the amount of available nutrients is 10 units, what will be the population size after 5 generations?
A. 500 bacteria
B. 1000 bacteria
C. 2000 bacteria
D. 5000 bacteria
Question 6
The process of osmoregulation in plants involves the movement of water across the plasma membrane. Which of the following is a key player in this process?
A. Aquaporins
B. Proton pumps
C. ATPases
D. Ion channels
Question 7
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 180
B. 200
C. 220
D. 240
Question 8
The diagram below shows a plant cell with a large vacuole. Which of the following statements is true about the vacuole?
A. The vacuole is responsible for storing water and salts.
B. The vacuole is responsible for storing sugars and amino acids.
C. The vacuole is responsible for storing waste products.
D. The vacuole is responsible for storing pigments.
Question 9
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell's turgor pressure?
A. It will decrease due to water loss
B. It will remain the same
C. It will increase due to water uptake
D. It will decrease due to cell lysis
Question 10
A population of bacteria is growing at a rate of 20% per hour. If the initial population is 1000, what will be the population after 3 hours?
A. 1600
B. 1800
C. 2000
D. 2200
Question 11
A diagram of the human circulatory system is shown below.
A. The heart is responsible for pumping blood to the lungs
B. The heart is responsible for pumping blood to the body
C. The arteries are responsible for transporting oxygenated blood
D. The veins are responsible for transporting deoxygenated blood
Question 12
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. To focus light onto the retina
B. To regulate the amount of light entering the eye
C. To transmit visual signals to the brain
D. To produce tears to lubricate the eye
Question 13
A population of 500 individuals is divided into 5 equal groups. If 20% of the individuals in each group are heterozygous for the gene controlling the flower color, what is the frequency of the dominant allele?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 14
The process of mitosis results in the production of
A. two daughter cells with the same number of chromosomes as the parent cell
B. four daughter cells with half the number of chromosomes as the parent cell
C. two daughter cells with a mix of chromosomes from the parent cell
D. no daughter cells at all
Question 15
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?
A. 0.2
B. 0.4
C. 0.6
D. 0.8

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