POST UTME CRAWFORD UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The Hardy-Weinberg principle states that the frequency of a gene in a population will remain cons\tant from generation to generation if
A. There is no mutation
B. There is no genetic drift
C. There is no gene flow
D. All of the above
Question 2
The growth and development of an organism is influenced by the following factors, EXCEPT:
A. Genetics
B. Nutrition
C. Hormones
D. Gravity
Question 3
In a typical terrestrial e\cosystem, what is the primary mechanism by which plants regulate water loss through transpiration?
A. Stomatal closure
B. Cuticular transpiration
C. Transpirational pull
D. Root pressure
Question 4
The classification of living organisms is based on the following characteristics, EXCEPT:
A. Cellular structure
B. Metabolic processes
C. Genetic makeup
D. Geographical distribution
Question 5
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. A
B. B
C. C
D. D
Question 6
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. 0.16
B. 0.24
C. 0.36
D. 0.64
Question 7
A researcher is studying the effect of pH on the growth of a particular species of bacteria. The researcher observes that the bacteria grow optimally at a pH of 7.0. What is the likely reason for this observation?
A. The bacteria have a pH-dep\endent enzyme that is active at pH 7.0
B. The bacteria have a pH-dep\endent transport protein that is active at pH 7.0
C. The bacteria have a pH-dep\endent membrane potential that is optimal at pH 7.0
D. The bacteria have a pH-dep\endent gene expression that is optimal at pH 7.0
Question 8
A patient is diagnosed with a bacterial infection. Which of the following antibiotics would be most effective against this type of infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 9
A diagram of a simple e\cosystem is shown below. What is the likely effect of introducing a new predator to the e\cosystem?
A. The population of the producer will increase
B. The population of the herbivore will decrease
C. The population of the predator will increase
D. The population of the decomposer will decrease
Question 10
The diagram below shows a simple black and white chemistry apparatus showing a titration setup. Identify the part labeled A.
A. Burette
B. Conical flask
C. Dropping pipette
D. Thermometer
Question 11
In the context of excretion, what is the primary function of the kidneys?
A. To regulate blood pressure through the renin-angioten\sin system.
B. To filter waste products from the blood.
C. To produce hormones that regulate electrolyte balance.
D. To maintain acid-base balance through the regulation of pH.
Question 12
The diagram below shows the structure of a plant cell. Identify the part labeled A.
A. Cell wall
B. Chloroplast
C. Vacuole
D. Mitochondria
Question 13
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Mitochondria
B. Chloroplast
C. Vacuole
D. Nucleus
Question 14
A diagram of a human reproductive system is shown below. What is the function of the ovary?
A. To produce eggs for fertilization
B. To transport the fertilized egg to the uterus
C. To regulate the menstrual cycle
D. To produce milk for the baby
Question 15
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2 during glycolysis
C. To pump protons across the mitochondrial membrane
D. To reduce oxygen to water

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