POST UTME ELIZADE UNIVERSITY 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 10 mL sample of a solution containing 0.5 M HCl is titrated with 0.5 M NaOH. What is the pH of the solution after the titration?
A. 7
B. 8
C. 9
D. 10
Question 2
The xylem in plants is responsible for transporting
A. water and minerals
B. sugars and amino acids
C. oxygen and carbon dioxide
D. nutrients and hormones
Question 3
In the context of evolutionary bio\logy, what is the primary mechanism driving the adaptation of the peppered moth (Biston betularia) to its environment?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 4
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 5
Asexual reproduction in plants can occur through
A. Budding
B. Fragmentation
C. Runners
D. Spores
Question 6
In a population of 1000 individuals, 200 are infected with a particular disease. If the disease is caused by a bacterium that has a generation time of 2 hours, what is the expected number of new infections after 12 hours?
A. 400
B. 500
C. 600
D. 800
Question 7
A genetic cross between two pea plants shows a 3:1 ratio of tall to short plants. What is the genotype of the short plants?
A. Tt
B. tt
C. TT
D. T
Question 8
The rate of diffusion of a subs\tance is influenced by
A. Temperature
B. Concentration gradient
C. Surface area
D. Pressure
Question 9
A person with a diet high in sugar and low in fiber is at risk for developing which of the following diseases?
A. Diabetes
B. Heart disease
C. Cancer
D. All of the above
Question 10
A nerve impulse travels down a motor neuron at a speed of 120 m/s. If the neuron is 2.5 cm long, how long does it take for the impulse to reach the \end of the neuron?
A. 0.02 s
B. 0.05 s
C. 0.1 s
D. 0.2 s
Question 11
The nervous system in humans is responsible for transmitting signals from the brain to the rest of the body. Which of the following is a type of neuron?
A. Motor neuron
B. Sensory neuron
C. Interneuron
D. All of the above
Question 12
A diagram of the water cycle is shown below. Which process is responsible for the formation of clouds?
A. Evaporation
B. Condensation
C. Precipitation
D. Runoff
Question 13
In a population of 1000 individuals, 500 are heterozygous for the gene controlling the production of the enzyme lactase. If 200 individuals are randomly selected for lactase production testing, what is the probability that at least 80 will be lactase producers?
A. 0.95
B. 0.90
C. 0.85
D. 0.80
Question 14
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. 0.48
D. 0.52
Question 15
The human body is home to trillions of microorganisms. Which of the following is a type of microorganism?
A. Bacteria
B. Virus
C. Fungus
D. All of the above

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