POST UTME EKSU 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the gonadal axis
D. Response to stress and anxiety
Question 2
The human eye is an example of a complex sense organ that is responsible for detecting light and transmitting visual information to the brain. Which of the following structures is responsible for focu\sing light onto the retina?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 3
In the xylem, what is the primary function of the tracheids?
A. Transporting water and minerals from the roots to the leaves
B. Producing sugars through photosynthesis
C. Storing starch and proteins
D. Regulating the opening and clo\sing of stomata
Question 4
A cell is placed in a hypotonic solution. What will happen to the cell?
A. The cell will shrink due to water loss
B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will lyse
Question 5
The sense organ responsible for detecting changes in air pressure is the
A. Ear
B. Eye
C. Nose
D. Labyrinth
Question 6
A 2.5 cm diameter xylem vessel has a cross-sectional area of 1.5 mm^2. If the xylem sap has a vis\cosity of 0.001 Pa·s and a pressure gradient of 10^5 Pa/m, what is the flow rate of the xylem sap?
A. 1.5 x 10^-6 m^3/s
B. 3.0 x 10^-6 m^3/s
C. 4.5 x 10^-6 m^3/s
D. 6.0 x 10^-6 m^3/s
Question 7
What is the term for the process by which plants adapt to their environment?
A. Evolution
B. Mutation
C. Genetic drift
D. Natural selection
Question 8
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. Site of protein synthesis
B. Site of lipid synthesis
C. Site of carbohydrate synthesis
D. Site of DNA replication
Question 9
A cell is placed in a solution with a higher concentration of glu\cose than its internal environment. What will happen to the cell?
A. The cell will shrink due to water loss
B. The cell will swell due to water uptake
C. The cell will remain unchanged
D. The cell will undergo apoptosis
Question 10
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 20% per hour, what will be the population size after 3 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 11
A diagram of a simple harmonic motion is shown below. What is the amplitude of the motion?
A. 2 cm
B. 4 cm
C. 6 cm
D. 8 cm
Question 12
A 500 mL sample of water contains 1 g of dissolved oxygen. If the partial pressure of oxygen in the air is 0.21 atm, what is the concentration of dissolved oxygen in the water?
A. 0.1 g/L
B. 0.5 g/L
C. 1.0 g/L
D. 5.0 g/L
Question 13
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?
A. A
B. B
C. C
D. D
Question 14
The process of mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is characterized by the separation of sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 15
In the context of nervous system function, what is the primary role of the cerebellum?
A. To integrate sensory information
B. To regulate muscle tone
C. To coordinate voluntary movements
D. To process visual information

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