POST UTME BSU 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 1.0
Question 2
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 3
The diagram below shows a cross-section of a plant root. What is the function of the cells labeled 'A'?
A. To absorb water and minerals from the soil
B. To store food produced by photosynthesis
C. To produce hormones that regulate plant growth
D. To support the structure of the plant
Question 4
A population of rabbits is introduced to a new island. What is the expected outcome in terms of population growth?
A. The population will remain cons\tant
B. The population will decrease due to predation
C. The population will increase exponentially
D. The population will stabilize at a carrying capacity
Question 5
In a population of E. coli bacteria, the mutation rate is 10^-5 per generation. If the population size is 10^6, what is the expected number of mutations per generation?
A. 10^-1
B. 10^0
C. 10^1
D. 10^2
Question 6
A diagram of a human respiratory system is shown below. Identify the part labeled 'B'.
A. Trachea
B. Diaphragm
C. Lungs
D. Bronchi
Question 7
In the context of genetics, what is the primary function of the gene regulatory elements in a eukaryotic genome?
A. To regulate gene expression by controlling the accessibility of DNA to transcription factors
B. To provide a region for the attachment of microtubules during spindle formation
C. To protect the chromosome from damage during meiosis
D. To facilitate the separation of sister chromatids during cell division
Question 8
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
Question 9
A diagram of a human skeletal system is shown below. Identify the part labeled 'C'.
A. Ribs
B. Skull
C. Vertebrae
D. Pelvis
Question 10
A diagram of the human circulatory system is shown below. What is the primary function of the coronary arteries?
A. Transportation of oxygenated blood to the heart
B. Transportation of deoxygenated blood to the lungs
C. Regulation of blood pressure
D. Maintenance of body temperature
Question 11
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 12
A plant cell is placed in a solution with a high concentration of sucrose. What is the expected outcome?
A. The cell will shrink due to water loss
B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will burst due to osmotic pressure
Question 13
A cell is placed in a solution with a concentration of 0.1 M glu\cose. If the cell is 10^-3 m^3 in volume, what is the total amount of glu\cose in moles?
A. 10^-6
B. 10^-5
C. 10^-4
D. 10^-3
Question 14
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 0.4
B. 0.8
C. 1.6
D. 2.0
Question 15
A diagram of a plant's xylem tissue is shown below. What is the primary function of the xylem tissue in this plant?
A. To transport water and minerals from the roots to the leaves
B. To store starch and other nutrients in the plant
C. To provide structural support to the plant
D. To regulate the plant's water potential

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