POST UTME BOWEN UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 50 g sample of a mixture of NaCl and KCl is dissolved in 100 mL of water. If the solution has a conductivity of 0.5 S/m, what is the molar concentration of the solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 2
A 10 mL sample of a solution containing 0.5 M glu\cose is added to a 90 mL sample of 0.2 M glu\cose. What is the resulting concentration of the solution?
A. 0.3 M
B. 0.4 M
C. 0.5 M
D. 0.6 M
Question 3
A patient is diagnosed with a bacterial infection that requires antibiotic treatment. Which of the following antibiotics is most likely to be effective against this infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 4
A 10% solution of glu\cose is diluted to 5% by adding water. What is the ratio of the initial volume to the final volume?
A. 1:2
B. 1:3
C. 2:3
D. 3:4
Question 5
A plant cell has a large central vacuole that contains a high concentration of solutes. What is the primary function of this vacuole?
A. To maintain cell turgor pressure
B. To store excess water
C. To regulate cell pH
D. To synthesize proteins
Question 6
A plant grows in a pot with a mixture of 70% sand and 30% clay. If the plant absorbs 100 mL of water, what is the amount of water absorbed by the sand?
A. 60 mL
B. 70 mL
C. 80 mL
D. 90 mL
Question 7
In the transport system of plants, the xylem is responsible for
A. Transporting water and minerals from the roots to the leaves
B. Transporting sugars and other organic compounds from the leaves to the roots
C. Regulating the amount of water in the plant
D. Maintaining the shape of the plant
Question 8
In a tropical rainforest, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following is a characteristic of these primary consumers?
A. They have a high metabolic rate
B. They have a low reproductive rate
C. They have a large body size
D. They have a specialized digestive system
Question 9
In a tropical rainforest e\cosystem, the primary producers are plants that undergo photosynthesis. Which of the following is a characteristic of the photosynthetic process?
A. The release of oxygen as a byproduct
B. The absorption of carbon dioxide
C. The release of water vapor
D. The absorption of sunlight
Question 10
A 5-year-old child is diagnosed with a rare genetic disorder that affects the production of a crucial enzyme. Which of the following is a likely consequence of this disorder?
A. Impaired vision
B. Severe muscle weakness
C. Abnormal skin pigmentation
D. Respiratory failure
Question 11
The process by which an organism's genetic information is altered by external factors is called what?
A. Mutation
B. Gene expression
C. Genetic drift
D. Epigenetics
Question 12
In a population of 1000 individuals, 200 are infected with a disease that has a 20% mortality rate. What is the expected number of deaths due to this disease?
A. 30
B. 40
C. 50
D. 60
Question 13
A 2.5 L flask contains 0.5 mol of an ideal gas at 27°C. If 1.5 mol of the gas is added to the flask, what is the new pressure?
A. 1.5 atm
B. 2.5 atm
C. 3.5 atm
D. 4.5 atm
Question 14
A researcher is studying the effect of light intensity on the rate of photosynthesis in a plant. Which of the following types of graphs would best represent the relationship between light intensity and rate of photosynthesis?
A. Inverted U-shaped curve
B. U-shaped curve
C. Straight line
D. Parabolic curve
Question 15
A diagram of a human brain is shown below. What is the primary function of the cerebral cortex?
A. To regulate body temperature
B. To control voluntary movements
C. To process sensory information
D. To synthesize proteins

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