POST UTME REDEEMERS UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the effect of pH on the growth of E. coli. The graph below shows the growth rate of E. coli at different pH levels. What is the pH level at which the growth rate is maximum?
A. 7
B. 6
C. 8
D. 9
Question 2
In the context of nervous coordination, what is the primary function of the cerebellum?
A. Regulation of body temperature
B. Stimulation of appetite
C. Regulation of muscle tone
D. Inhibition of stress response
Question 3
A diagram of the human circulatory system is shown below. Which part of the system is responsible for transporting oxygenated blood from the lungs to the heart?
A. Pulmonary Veins
B. Pulmonary Arteries
C. Aorta
D. Superior Vena Cava
Question 4
In the context of osmoregulation, what is the primary function of the hypothalamus in regulating thirst and hunger?
A. To regulate the release of ADH and aldosterone
B. To stimulate the sensation of thirst and hunger
C. To control the balance of electrolytes and water in the body
D. To regulate the release of insulin and glucagon
Question 5
The process by which an organism's cells become specialized to perform specific functions is called?
A. Mitosis
B. Meiosis
C. Differentiation
D. Heredity
Question 6
A plant cell is placed in a solution with a pH of 5.5. What will happen to the cell membrane?
A. The cell membrane will become more permeable.
B. The cell membrane will become less permeable.
C. The cell membrane will remain unchanged.
D. The cell membrane will rupture.
Question 7
A diagram of a neuron is shown below. Which part of the neuron is responsible for transmitting signals to other neurons?
A. Axon
B. D\endrite
C. Cell body
D. Myelin sheath
Question 8
A species of plant has a photosynthetic rate of 10 mg CO2/h. If the plant is exposed to a light intensity of 100 μmol/m²s, what is the rate of photosynthesis?
A. 0.1 mg CO2/h
B. 1 mg CO2/h
C. 10 mg CO2/h
D. 100 mg CO2/h
Question 9
A species of bird has a wing span of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the power output of the bird's wings?
A. 1000 W
B. 500 W
C. 2000 W
D. 3000 W
Question 10
A researcher is studying the effect of temperature on the growth of a microorganism. The graph below shows the growth rate of the microorganism at different temperatures. What is the temperature at which the growth rate is maximum?
A. 30°C
B. 40°C
C. 50°C
D. 60°C
Question 11
A plant has a photosynthetic rate of 10 mg CO2 per hour. If the plant is exposed to light for 8 hours, how much CO2 will it absorb?
A. 80 mg
B. 100 mg
C. 120 mg
D. 140 mg
Question 12
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Stimulation of appetite
C. Regulation of hormone secretion
D. Inhibition of stress response
Question 13
A diagram of a cell membrane is shown below. What is the function of the structure labeled 'A'?
A. Selective permeability
B. Active transport
C. Passive transport
D. Osmosis
Question 14
In the context of coordination, what is the primary function of the cerebellum?
A. To regulate the release of hormones that stimulate movement
B. To regulate the release of hormones that inhibit movement
C. To coordinate voluntary movements
D. To regulate the release of hormones that stimulate sensation
Question 15
A population of rabbits is growing according to the \logistic growth model. The initial population size is 100, and the carrying capacity is 1000. If the growth rate is 0.2, what is the population size after 5 years?
A. 500
B. 750
C. 900
D. 950

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