POST UTME CRAWFORD UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The gene for the ABO blood type is located on chromosome 9. Which of the following is a possible genotype for an individual with type A blood?
A. IA
B. IB
C. IO
D. IA and IB
Question 2
In a study on the eco\logy of a freshwater lake, researchers observed that the population of zooplankton increased exponentially with the concentration of nutrients in the water. If the population of zooplankton is modeled by the equation P(t) = P0 * e^(kt), where P0 is the initial population, e is the base of the natural \logarithm, and k is a cons\tant, and if the population of zooplankton is 1000 at time t = 0, and 2000 at time t = 2, what is the value of k?
A. 0.5
B. 1.0
C. 1.5
D. 2.0
Question 3
A microorganism is isolated from a patient and identified as Staphylococcus aureus. Which of the following diseases is most likely caused by this microorganism?
A. Meningitis
B. Pneumonia
C. Skin infection
D. Gastroenteritis
Question 4
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, calculate the frequency of the homozygous dominant genotype 'AA'.
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 5
A researcher is studying the structure of a protein that is involved in the transmission of a disease. The protein has a specific shape that allows it to bind to a receptor on the surface of a host cell. If the researcher mutates the protein to change its shape, what is the likely effect on the protein's ability to bind to the receptor?
A. The protein's ability to bind to the receptor will improve.
B. The protein's ability to bind to the receptor will worsen.
C. The protein's ability to bind to the receptor will remain the same.
D. The protein's ability to bind to the receptor will be unaffected.
Question 6
The diagram below shows the structure of the human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 7
A diagram of the human heart is shown below. What is the function of the tricuspid valve?
A. To prevent blood from flowing back into the atrium
B. To allow blood to flow from the atrium to the ventricle
C. To regulate blood pressure
D. To control heart rate
Question 8
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will swell and eventually burst
B. The cell will shrink and lose water
C. The cell will remain unchanged
D. The cell will undergo mitosis
Question 9
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.3. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.49
B. 0.61
C. 0.73
D. 0.85
Question 10
The microorganism responsible for the production of antibiotics is
A. Bacillus subtilis
B. Escherichia coli
C. Staphylococcus aureus
D. Penicillium chrysogenum
Question 11
A diagram of the human digestive system is shown below. What is the function of the pancreas?
A. To produce bile
B. To produce digestive enzymes
C. To absorb nutrients
D. To regulate blood sugar levels
Question 12
A diagram of the human respiratory system is shown below. What is the function of the diaphragm?
A. To regulate blood pressure
B. To control heart rate
C. To expand the chest cavity
D. To contract the chest cavity
Question 13
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. 0.5
B. 0.75
C. 0.9
D. 0.95
Question 14
In the process of digestion, what is the role of the pancreas?
A. To produce digestive enzymes
B. To regulate the pH of the digestive system
C. To absorb nutrients into the bloodstream
D. To produce bile
Question 15
The process by which plants transport water and minerals from the roots to the leaves is called
A. Transpiration
B. Photosynthesis
C. Respiration
D. Translocation

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