POST UTME AFE BABALOLA UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
A. 0.6
B. 0.8
C. 0.4
D. 0.2
Question 2
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of which of the following?
A. ATP
B. NADPH
C. Glu\cose
D. Oxygen
Question 3
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Genetic recombination
C. Gene duplication
D. Gene deletion
Question 4
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. What is the pressure of the gas, in atm, if the gas cons\tant R = 0.082 L atm/mol K?
A. 1.5 atm
B. 2.5 atm
C. 3.5 atm
D. 4.5 atm
Question 5
A patient has a respiratory rate of 24 breaths per minute. What is the primary function of the diaphragm in this patient's respiratory system?
A. Expansion and contraction of the lungs
B. Increase in air pressure in the lungs
C. Decrease in air pressure in the lungs
D. Regulation of body temperature
Question 6
A diagram of the human respiratory system is shown below. Which part of the system is responsible for exchanging oxygen and carbon dioxide?
A. Trachea
B. Bronchi
C. Alveoli
D. Diaphragm
Question 7
A species of bird has a wing length of 10 cm with a s\tandard deviation of 2 cm. If a sample of 100 birds is taken, what is the probability that the mean wing length of the sample will be less than 9 cm?
A. 0.025
B. 0.05
C. 0.1
D. 0.2
Question 8
A patient is diagnosed with a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most effective against this bacterium?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 9
A diagram of a plant cell is shown below. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Endoplasmic reticulum
Question 10
The process of digestion in the human body \begins in the mouth.
A. True
B. False
C. Digestion \begins in the stomach
D. Digestion \begins in the small intestine
Question 11
A cell is placed in a solution containing 0.1 M glu\cose and 0.1 M fructose. If the cell is permeable to both glu\cose and fructose, what is the concentration of glu\cose in the cell after 1 hour?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 12
In the context of eco\logy, what is the primary function of a "keystone species" in a given e\cosystem?
A. To occupy a unique eco\logical niche
B. To have a disproportionate impact on its environment
C. To be a primary producer in the food chain
D. To be a top predator in the food chain
Question 13
A plant has a root system with a high surface area to volume ratio. What is the primary advantage of this root system?
A. Increased water and nutrient uptake
B. Reduced water and nutrient loss
C. Increased support and protection
D. Increased photosynthesis
Question 14
A diagram shows a simple harmonic motion with a period of 2 s. What is the frequency of this motion?
A. 0.5 Hz
B. 1 Hz
C. 1.5 Hz
D. 2 Hz
Question 15
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. 0.16
D. 0.84

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