POST UTME PAN-ATLANTIC UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The microorganism responsible for cau\sing tuberculosis is?
A. Mycobacterium tuberculosis
B. Staphylococcus aureus
C. Escherichia coli
D. Pseudomonas aeruginosa
Question 2
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating the pituitary gland?
A. Secretion of hormones that stimulate or inhibit the release of other hormones
B. Regulation of body temperature
C. Control of hunger and thirst
D. Maintenance of blood pressure
Question 3
In a photosynthetic pathway, which of the following is the primary electron acceptor in the light-dep\endent reactions?
A. ATP synthase
B. Plastocyanin
C. Pheophytin
D. ferredoxin
Question 4
The process of cellular respiration involves the breakdown of glu\cose to produce energy in the form of ATP. Which of the following stages of cellular respiration is responsible for the production of ATP?
A. Glycolysis
B. Pyruvate oxidation
C. Citric acid cycle
D. Oxidative phosphorylation
Question 5
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. 0.20
D. 0.80
Question 6
A bio\logist is studying the effect of light on the growth of a plant. The graph below shows the growth rate of the plant at different light intensities.
A. The growth rate increases with increa\sing light intensity.
B. The growth rate decreases with increa\sing light intensity.
C. The growth rate remains cons\tant at all light intensities.
D. The growth rate is highest at 100 μmol/m²s.
Question 7
In the context of hormonal coordination, which of the following hormones is responsible for regulating blood glu\cose levels?
A. Insulin
B. Glucagon
C. Adrenaline
D. Thyroxine
Question 8
A diagram of a neuron is shown below. What is the function of the d\endrites?
A. Receive signals from other neurons
B. Transmit signals to other neurons
C. Generate action potentials
D. Maintain the neuron's resting potential
Question 9
The xylem tissue in a plant consists of dead cells that are responsible for transporting water and minerals from the roots to the leaves. Which of the following types of xylem cells is responsible for the majority of water transport?
A. Tracheids
B. Vessel elements
C. Fibers
D. Parechyma
Question 10
A researcher is studying the effect of pH on the growth of E. coli. The researcher finds that the growth rate of E. coli is highest at pH 7.0. What is the likely reason for this?
A. The optimal pH for E. coli growth is 7.0.
B. The pH 7.0 is the optimal pH for the growth of most bacteria.
C. The researcher used a different method to measure the growth rate.
D. The pH 7.0 is the optimal pH for the growth of E. coli in a specific environment.
Question 11
A bio\logist is studying the classification of living organisms. Which of the following kingdoms is characterized by the presence of a true nucleus and complex cell structures?
A. Monera
B. Protista
C. Fungi
D. Animalia
Question 12
A genetic cross is performed between two organisms with the following genotypes: F1 = AaBb and F2 = AaBb x aaBB. What is the probability of the offspring being homozygous recessive for the B gene?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 13
A diagram of a typical e\cosystem is shown below. What is the primary role of the decomposers in the e\cosystem?
A. To produce nutrients for the plants
B. To regulate the population of the animals
C. To break down dead organic matter
D. To facilitate the exchange of gases
Question 14
A diagram of a plant cell is shown below. Which of the following structures is responsible for photosynthesis?
A. Chloroplast
B. Vacuole
C. Cell Wall
D. Mitochondria
Question 15
A diagram of a typical animal tissue is shown below. What is the primary function of the tissue?
A. To provide structural support
B. To facilitate the exchange of nutrients and waste
C. To regulate body temperature
D. To produce hormones

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