POST UTME CHRISTOPHER UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 cm long root hair cell has a diameter of 10 μm. If the cell membrane is 7.5 nm thick, what is the surface area of the cell membrane?
A. 0.00015 m^2
B. 0.0003 m^2
C. 0.00045 m^2
D. 0.0006 m^2
Question 2
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 3
A population of a species is found to have a high degree of genetic variation. Which of the following is a likely consequence of this genetic variation?
A. The population is more likely to adapt to changing environments
B. The population is less likely to adapt to changing environments
C. The population is more likely to go extinct
D. The population is less likely to go extinct
Question 4
A 2.5 cm long root hair cell has a diameter of 10 μm. If the cell membrane is 7.5 nm thick, what is the volume of the cell?
A. 0.00015 m^3
B. 0.0003 m^3
C. 0.00045 m^3
D. 0.0006 m^3
Question 5
A kidney stone is formed when the concentration of certain subs\tances in the urine exceeds the solubility of those subs\tances. Which of the following subs\tances is most likely to form a kidney stone?
A. Calcium oxalate
B. Magnesium phosphate
C. Uric acid
D. Cystine
Question 6
A species of plant has a characteristic leaf shape that is used to identify it. Which of the following is a likely reason for the evolution of this characteristic?
A. The leaf shape provides protection from herbivores
B. The leaf shape allows for more efficient photosynthesis
C. The leaf shape is used for reproduction
D. The leaf shape is used for thermoregulation
Question 7
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 1
B. 2
C. 3
D. 4
Question 8
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a characteristic 'chain of beads' appearance under the microscope. What is the most likely cause of this infection?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Escherichia coli
D. Pseudomonas aeruginosa
Question 9
A diagram of a cell division process is shown below. Identify the stage labeled 'C'.
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 10
The process of meiosis in a diploid organism results in the production of four haploid cells. Which of the following is a characteristic of these haploid cells?
A. They have the same number of chromosomes as the parent cell
B. They have half the number of chromosomes as the parent cell
C. They have a different number of chromosomes than the parent cell
D. They are genetically identical to the parent cell
Question 11
A 5 L container is filled with a gas at a pressure of 2 atm and a temperature of 300 K. What is the volume of the gas at a pressure of 1 atm and a temperature of 400 K?
A. 10 L
B. 15 L
C. 20 L
D. 25 L
Question 12
A diagram of a cell's mitotic spindle is shown below. Which of the following is the primary function of the centrioles?
A. Forming the mitotic spindle
B. Separating the chromosomes
C. Regulating the cell's cycle
D. Supporting the cell's structure
Question 13
In the context of the nervous system, what is the primary function of the olfactory bulb?
A. To process visual information
B. To process auditory information
C. To process olfactory information
D. To process gustatory information
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 stages of mitosis is characterized by the separation of sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 15
A species of animal has a unique adaptation that allows it to survive in a particular environment. Which of the following is a likely reason for the evolution of this adaptation?
A. The adaptation provides protection from predators
B. The adaptation allows for more efficient foraging
C. The adaptation is used for thermoregulation
D. The adaptation is used for reproduction

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