POST UTME MADONNA UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a photosynthetic pathway, which of the following pigments is responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins
Question 2
The diagram below shows the structure of a plant cell. What is the function of the organelle labeled 'A'?
A. To synthesize proteins
B. To store genetic information
C. To regulate cell growth
D. To transport materials across the cell membrane
Question 3
In the context of eco\logy, what is the term for the process by which plants release water vapor into the air?
A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation
Question 4
A diagram shows a plant with the genotype Rr. If the plant is crossed with a plant with the genotype rr, what is the probability that the offspring will have the genotype Rr?
A. 0.5
B. 0.75
C. 0.9
D. 1
Question 5
A plant has a genotype of BBSS. What is the probability that it will produce a gamete with the genotype SS?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 6
A microorganism is isolated from a patient's blood culture. Which of the following types of microorganisms is most likely responsible for this infection?
A. Bacteria
B. Fungi
C. Viruses
D. Protozoa
Question 7
A bio\logist is studying the growth of a population of bacteria. The initial population is 1000, and the population doubles every 2 hours. If the bio\logist wants to know the population after 6 hours, what is the population?
A. 1000
B. 2000
C. 4000
D. 8000
Question 8
In the context of growth and regulation, what is the term for the process by which cells divide to form new cells?
A. Mitosis
B. Meiosis
C. Growth
D. Differentiation
Question 9
A diagram shows a plant with the genotype Rr. If the plant is crossed with a plant with the genotype rr, what is the probability that the offspring will have the genotype rr?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 10
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 11
A neuron is stimulated by a sensory receptor. Which of the following types of receptors is most likely responsible for this stimulation?
A. Mechanoreceptors
B. Thermoreceptors
C. Photoreceptors
D. Chemoreceptors
Question 12
In the context of respiration, what is the primary function of the mitochondria in the process of cellular respiration?
A. To generate ATP through the citric acid cycle
B. To produce NADH and FADH2 through glycolysis
C. To synthesize glu\cose from CO2 and H2O
D. To break down glu\cose into pyruvate through glycolysis
Question 13
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. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 14
In a population of 1000 individuals, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 15
A diagram shows a plant with a long stem and narrow leaves. What is the most likely reason for this phenotype?
A. Lack of light
B. High temperature
C. Low water availability
D. Genetic mutation

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