POST UTME SUMMIT UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 25-year-old woman presents with a 2-year history of progressive weakness and fatigue. Her hemoglobin level is 8 g/dL. Which of the following is the most likely diagnosis?
A. Iron deficiency anemia
B. Thalassemia major
C. Sickle cell disease
D. Pernicious anemia
Question 2
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.2 per hour, what is the population size after 3 hours?
A. 300
B. 600
C. 1200
D. 2400
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.16
B. 0.24
C. 0.36
D. 0.48
Question 4
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 its turgor pressure
C. The cell will remain unchanged
D. The cell will undergo photosynthesis
Question 5
A diagram of a human eye is shown below. What is the function of the lens?
A. To focus light on the retina
B. To regulate the amount of light entering the eye
C. To produce tears
D. To maintain the shape of the eye
Question 6
A diagram of a plant cell is shown below. What is the function of the organelle labeled 'X'?
A. To synthesize proteins
B. To store genetic information
C. To regulate the movement of ions
D. To provide structural support
Question 7
A plant cell has a cell wall composed of cellulose. What is the primary function of the cell wall?
A. To provide structural support
B. To regulate the movement of ions
C. To synthesize proteins
D. To store genetic information
Question 8
A 2.5 g sample of a compound containing only carbon and hydrogen is burned in a combustion apparatus. The volume of carbon dioxide produced is 2.5 liters at 25°C and 1 atm. What is the empirical formula of the compound?
A. CH4
B. C2H6
C. C3H8
D. C4H10
Question 9
A population of Drosophila melanogaster is being studied for its genetic variation. The frequency of the recessive allele 'a' is 0.2. What is the probability that two randomly selected flies will be homozygous recessive?
A. 0.04
B. 0.08
C. 0.16
D. 0.32
Question 10
In the context of eco\logy, what is the primary function of a keystone species in a given e\cosystem?
A. To regulate the population of other species
B. To provide a source of food for other species
C. To create a habitat for other species
D. To maintain the balance of the e\cosystem
Question 11
A researcher is studying the effect of a new pesticide on the growth of wheat. The pesticide is applied at a concentration of 10 mg/L. What is the concentration of the pesticide in the soil after 5 days of application, given that the half-life of the pesticide is 3 days?
A. 1.25 mg/L
B. 2.5 mg/L
C. 5 mg/L
D. 10 mg/L
Question 12
A population of bacteria is growing exponentially. If the population size is currently 1000 and is increa\sing at a rate of 20% per hour, what will be the population size after 3 hours?
A. 1600
B. 2000
C. 2500
D. 3000
Question 13
A plant has a root system with a total surface area of 100 cm^2. The root system is composed of 5 roots, each with a surface area of 20 cm^2. What is the average surface area of each root?
A. 10 cm^2
B. 15 cm^2
C. 20 cm^2
D. 25 cm^2
Question 14
The process of mitosis results in the production of two daughter cells that are genetically identical to the parent cell. Which of the following statements is true about the genetic variation in these two cells?
A. The two cells will have the same genotype and phenotype.
B. The two cells will have different genotypes but the same phenotype.
C. The two cells will have different genotypes and phenotypes.
D. The two cells will have the same genotype but different phenotypes.
Question 15
Which of the following is an example of a system that is composed of multiple organs that work together to perform a specific function?
A. Circulatory system
B. Nervous system
C. Digestive system
D. Respiratory system

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