POST UTME ESUT 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a food chain, what is the role of a decomposer?
A. To produce energy for the e\cosystem
B. To break down dead organic matter
C. To regulate the population of other species
D. To maintain the structure of the e\cosystem
Question 2
A diagram of the human brain is shown below. Identify the part labeled 'B'.
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Frontal lobe
Question 3
The diagram below shows the structure of a typical plant cell. Identify the organelle responsible for protein synthesis.
A. Mitochondria
B. Chloroplast
C. Ribosome
D. Lysosome
Question 4
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a random sample of 50 individuals is taken from this population, what is the probability that the sample mean height is greater than 175 cm?
A. 0.0576
B. 0.0960
C. 0.1440
D. 0.1920
Question 5
A researcher is studying the effect of pH on the growth of Escherichia coli. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. Which of the following statements is true about the graph?
A. The graph is a straight line.
B. The graph is a curve.
C. The graph has a peak at pH 7.
D. The graph has a trough at pH 7.
Question 6
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the stage of the cell cycle that the cell will enter next?
A. G1
B. S
C. G2
D. M
Question 7
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.48
D. 0.52
Question 8
A population of bacteria is growing exponentially with a growth rate of 0.5 per hour. If the initial population size is 1000 cells, what is the population size after 3 hours?
A. 1000
B. 1500
C. 2250
D. 3000
Question 9
The process of cell division that results in the production of four daughter cells, each with the same number of chromosomes as the parent cell, is called
A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication
Question 10
A plant's xylem is responsible for transporting water and minerals from the roots to the leaves through the process of
A. Transpiration
B. Photosynthesis
C. Osmosis
D. Capillary action
Question 11
A cell in the G2 phase of the cell cycle has a DNA content of 8C. If the cell is in a culture medium with a glu\cose concentration of 1 g/L, what is the rate of glu\cose uptake by the cell?
A. 0.125 g/L
B. 0.250 g/L
C. 0.500 g/L
D. 1.000 g/L
Question 12
A genetic trait is determined by a \single gene with two alleles. If the dominant allele is represented by the letter 'R' and the recessive allele is represented by the letter 'r', what is the genotype of an individual that is homozygous dominant for the trait?
A. RR
B. Rr
C. rr
D. RrRr
Question 13
A species of bird has a wing span of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the angular velocity of the bird's wings?
A. 10 rad/s
B. 20 rad/s
C. 30 rad/s
D. 40 rad/s
Question 14
In the context of xylem transport, what is the primary function of the xylem parenchyma cells?
A. Storage of water and minerals
B. Transport of water and minerals
C. Production of xylem sap
D. Regulation of water potential
Question 15
A diagram of a cell's structure is shown below. What is the function of the organelle labeled 'B'?
A. producing energy for the cell
B. regulating cell growth and division
C. storing genetic information
D. transporting subs\tances into and out of the cell

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