POST UTME BSU 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of meiosis results in the production of four haploid cells from a diploid cell. Which of the following is a characteristic of the cells produced by meiosis?
A. They have the same number of chromosomes as the parent cell
B. They have half the number of chromosomes as the parent cell
C. They have the same genetic makeup as the parent cell
D. They are genetically identical to each other
Question 2
The diagram below shows a cross-section of a 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 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. 0.64
B. 0.36
C. 0.48
D. 0.16
Question 4
A diagram of a human skeletal system is shown below. Identify the part labeled 'C'.
A. Ribs
B. Skull
C. Vertebrae
D. Pelvis
Question 5
In the context of eco\logical succession, what is the primary mechanism driving the transition from a pioneer community to a climax community?
A. Primary production
B. Nutrient cycling
C. Predation and competition
D. Climate change
Question 6
A scientist is studying the effect of pH on enzyme activity. What is the expected outcome?
A. Enzyme activity increases with increa\sing pH
B. Enzyme activity decreases with increa\sing pH
C. Enzyme activity remains cons\tant with changing pH
D. Enzyme activity is unaffected by pH
Question 7
A population of rabbits is introduced to a new island. What is the expected outcome in terms of population growth?
A. Exponential growth
B. Logistic growth
C. Sigmoid growth
D. No growth
Question 8
In the context of genetics, what is the primary function of the centromere in a eukaryotic chromosome?
A. To facilitate the separation of sister chromatids during cell division
B. To provide a region for the attachment of microtubules during spindle formation
C. To regulate gene expression by controlling the accessibility of DNA to transcription factors
D. To protect the chromosome from damage during meiosis
Question 9
In the context of xylem transport, what is the primary mechanism by which water and minerals are absorbed by the roots and transported to the leaves?
A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis
Question 10
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Cell wall
D. Chloroplast
Question 11
A person is given a dose of 100 mg of a drug with a volume of distribution of 10 L. If the drug is 90% bound to plasma proteins, what is the free \fraction of the drug?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 12
In the context of hormonal coordination, what is the primary function of the hypothalamus-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the immune system
D. Response to stress and anxiety
Question 13
A diagram of a human respiratory system is shown below. Identify the part labeled 'B'.
A. Trachea
B. Diaphragm
C. Lungs
D. Bronchi
Question 14
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To detect movement
C. To regulate pupil size
D. To produce tears
Question 15
The growth of a plant is influenced by the availability of light, water, and nutrients. What is the term for the process by which plants adjust their growth in response to environmental stimuli?
A. Phototropism
B. Hydrotropism
C. Thigmotropism
D. Hormesis

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