POST UTME REDEEMERS UNIVERSITY 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of mitosis results in the production of which of the following?
A. Haploid cells
B. Diploid cells
C. Gametes
D. Somatic cells
Question 2
A solution of 0.1 M NaCl is prepared by dissolving 0.1 mol of NaCl in 1 L of water. What is the concentration of the solution in terms of molarity?
A. 0.1 M
B. 0.01 M
C. 0.001 M
D. 0.0001 M
Question 3
A geneticist is studying a population of fruit flies and wants to determine the frequency of a particular allele. She collects 100 flies and finds that 60 of them have the allele. What is the frequency of the allele in this population?
A. 0.6
B. 0.4
C. 0.2
D. 0.1
Question 4
The process of osmoregulation in animals involves the regulation of which of the following?
A. Water balance
B. Electrolyte balance
C. pH balance
D. All of the above
Question 5
A species of bird has a beak shape that is well-suited for cracking open nuts. However, this beak shape also makes it difficult for the bird to eat seeds. What type of natural selection is occurring in this population?
A. Directional selection
B. Stabilizing selection
C. Disruptive selection
D. Balancing selection
Question 6
A population of bacteria is growing exponentially. If the initial population is 100 and the growth rate is 25% per hour, what will be the population after 3 hours?
A. 225
B. 250
C. 275
D. 300
Question 7
A diagram of a human heart is shown below. What is the primary function of the atria?
A. To pump blood to the lungs
B. To pump blood to the body
C. To regulate blood pressure
D. To synthesize hormones
Question 8
The process by which plants release water vapor into the air is called
A. Transpiration
B. Respiration
C. Photosynthesis
D. Osmosis
Question 9
A diagram of a human kidney is shown below. What is the primary function of the nephrons?
A. To filter waste from the blood
B. To regulate blood pressure
C. To synthesize hormones
D. To regulate pH
Question 10
A diagram of a human digestive system is shown below. What is the primary function of the small intestine?
A. To absorb nutrients
B. To store waste
C. To regulate pH
D. To synthesize hormones
Question 11
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπγαλλενγ παπτερσ \( anaphase-promoting complex \). What is the primary function of the Δπγαλλενγ παπτερσ in this process?
A. To degrade the cohe\sin proteins holding sister chromatids together
B. To activate the kinetochore proteins that attach to microtubules
C. To phosphorylate the histone proteins that condense chromatin
D. To recruit the spindle checkpoint proteins that monitor chromosome alignment
Question 12
A diagram of the human digestive system is shown below. Which part is responsible for the breakdown of proteins?
A. Mouth
B. Stomach
C. Small intestine
D. Large intestine
Question 13
A diagram of a human eye is shown below. What is the primary function of the retina?
A. To regulate light
B. To regulate color
C. To regulate movement
D. To regulate thought
Question 14
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. To focus light on the retina
B. To detect changes in light intensity
C. To regulate the amount of light entering the eye
D. To transmit visual signals to the brain
Question 15
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Active transport of ions across the renal tubules
B. Passive diffusion of ions across the renal tubules
C. Excretion of excess ions through the urine
D. Reabsorption of ions from the filtrate

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