POST UTME WELLSPRING UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher studying the effects of light intensity on plant growth uses a growth chamber with a light spectrum of 400-700 nm. Which part of the electromagnetic spectrum does this light fall into?
A. Infrared
B. Visible
C. Ultraviolet
D. X-ray
Question 2
A plant has a 20% chance of producing a red flower and a 30% chance of producing a yellow flower. What is the probability that the plant will produce a red flower or a yellow flower?
A. 0.10
B. 0.20
C. 0.30
D. 0.40
Question 3
A patient presents with symptoms of diarrhea and abdominal cramps. A stool sample is collected and cultured on a selective medium. The growth of the microorganism is shown below. What is the likely identity of the microorganism?
A. Escherichia coli
B. Salmonella enterica
C. Shigella dysenteriae
D. Campylobacter jejuni
Question 4
The process of natural selection can lead to the evolution of a population in which the average height of individuals increases over time. Which of the following mechanisms is responsible for this change?
A. Genetic drift
B. Gene flow
C. Mutation
D. Selection
Question 5
In a eukaryotic cell, the process of mitosis involves the separation of chromosomes into two daughter cells. Which of the following stages of mitosis is characterized by the condensation of chromosomes?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 6
In a process of cellular respiration, the glu\cose molecule (C6H12O6) is converted into carbon dioxide and water. What is the net energy yield from the complete breakdown of one glu\cose molecule?
A. 36 ATP
B. 42 ATP
C. 48 ATP
D. 60 ATP
Question 7
The diagram below shows the structure of a nerve cell. Which part of the cell is responsible for transmitting signals to other cells?
A. D\endrite
B. Axon
C. Cell Body
D. Myelin Sheath
Question 8
The process of meiosis involves the reduction of the number of chromosomes in a cell from diploid to haploid. Which of the following stages of meiosis is characterized by the separation of homo\logous chromosomes?
A. Meiosis I
B. Meiosis II
C. Prophase I
D. Anaphase I
Question 9
A solution of glu\cose is being transported across a cell membrane u\sing facilitated diffusion. If the concentration of glu\cose on the outside is 10 mM and the concentration on the inside is 5 mM, what is the direction of glu\cose transport?
A. Into the cell
B. Out of the cell
C. No net transport
D. Dep\ends on the concentration gradient
Question 10
A plant has a photosynthetic rate of 10 μmol CO2/s. If the light intensity is increased by 50%, what is the new photosynthetic rate?
A. 5
B. 10
C. 15
D. 20
Question 11
The diagram below shows the structure of a human heart. Which of the following is the primary function of the atrioventricular (AV) node?
A. To regulate the heartbeat
B. To pump blood from the atria to the ventricles
C. To produce hormones that regulate blood pressure
D. To store blood for the body
Question 12
A species of fish has a body length of 10 cm. If the body length is directly proportional to the cube root of the fish's weight, and the fish's weight is 100 g, what is the body length of a fish with a weight of 400 g?
A. 15 cm
B. 20 cm
C. 25 cm
D. 30 cm
Question 13
The diagram below shows the structure of a plant root. Which of the following is the primary function of the root hair?
A. To absorb water and minerals from the soil
B. To anchor the plant in the soil
C. To produce hormones that regulate plant growth
D. To store food for the plant
Question 14
A 5-metre tall person is s\tanding 10 metres away from a convex lens of focal length 0.5 metres. What is the magnification of the image formed by the lens?
A. -0.5
B. -1.0
C. -1.5
D. -2.0
Question 15
In a population of 1000 individuals, the frequency of the dominant allele (A) is 0.6 and the frequency of the recessive allele (a) is 0.4. What is the expected frequency of the homozygous dominant genotype (AA)?
A. 0.36
B. 0.48
C. 0.52
D. 0.64

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