POST UTME WELLSPRING UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of rabbits is growing \logistically, with a carrying capacity of 1000 individuals. If the initial population size is 500 rabbits, what is the population size after 10 years?
A. 500
B. 750
C. 1000
D. 1250
Question 2
In a diploid cell, what is the total number of chromosomes in the somatic cells?
A. 46
B. 92
C. 23
D. 46
Question 3
A diagram of the human skeletal system is shown below. Which bone is responsible for protecting the heart?
A. Skull
B. Ribs
C. Spine
D. Sternum
Question 4
A person has a visual acuity of 20/20 in both eyes. Which of the following is the most likely explanation for this result?
A. The person has perfect vision
B. The person has a re\fractive error
C. The person has a visual field defect
D. The person has a neuro\logical disorder
Question 5
A patient is diagnosed with a bacterial infection. The bacteria are Gram-positive and have a thick peptidoglycan cell wall. Which of the following antibiotics is most likely to be effective against this infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 6
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 protein kinase Cdc28. What is the primary function of the Cdc28 protein kinase in this context?
A. To phosphorylate and activate the cyclin-dep\endent kinase
B. To bind to and inhibit the anaphase-promoting complex
C. To regulate the expression of the histone genes
D. To control the assembly of the mitotic spindle
Question 7
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
B. Diffusion
C. Active transport
D. Passive transport
Question 8
What is the primary function of the mitochondria in a cell?
A. Protein synthesis
B. Cell signaling
C. Energy production
D. Cell division
Question 9
In the process of cellular division, what is the primary function of the mitotic spindle?
A. To synthesize DNA
B. To separate chromosomes
C. To regulate cell growth
D. To transport molecules across the cell membrane
Question 10
A plant cell is placed in a solution containing 0.1 M glu\cose. What is the concentration of glu\cose in the cell after 30 minutes, assuming that the cell membrane is permeable to glu\cose?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 11
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. To regulate the amount of light entering the eye
B. To focus light onto the retina
C. To detect light and transmit signals to the brain
D. To produce tears and lubricate the eye
Question 12
In the context of microorganisms and diseases, what is the term for the process by which a pathogen invades and colonizes a host?
A. Infection
B. Colonization
C. Toxification
D. Transduction
Question 13
In the context of evolutionary theory, what is the primary mechanism by which natural selection acts on genetic variation within a population?
A. Genetic drift
B. Gene flow
C. Mutation
D. Selection pressure
Question 14
The cell membrane is a semi-permeable membrane that regulates the movement of subs\tances in and out of the cell. Which of the following is a function of the cell membrane?
A. To regulate the movement of subs\tances in and out of the cell
B. To provide structural support to the cell
C. To synthesize proteins
D. To store genetic information
Question 15
A population of bacteria is growing exponentially, with a doubling time of 2 hours. If the initial population size is 1000 bacteria, what is the population size after 6 hours?
A. 4000
B. 6000
C. 8000
D. 10000

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