POST UTME IGBINEDION UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human respiratory system is shown below. What is the primary function of the lungs?
A. To exchange oxygen and carbon dioxide
B. To regulate the amount of air in the lungs
C. To produce mucus
D. To maintain the shape of the lungs
Question 2
A 2.5 M solution of NaOH is mixed with a 1.5 M solution of HCl. What is the pH of the resulting solution?
A. 0.5
B. 1
C. 2
D. 3
Question 3
A 5.0-L sample of a gas at 27°C is collected over water at 20°C. What is the partial pressure of the gas?
A. 1.2 atm
B. 1.5 atm
C. 2.0 atm
D. 2.5 atm
Question 4
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Natural selection
D. Heritability
Question 5
A 50-g sample of a subs\tance is found to have a mass of 25 g after being placed in a vacuum oven at 100°C for 24 hours. What is the percentage loss in mass?
A. 20%
B. 30%
C. 40%
D. 50%
Question 6
In the context of eco\logy, what is the primary function of a keystone species in a biotic community?
A. To occupy a unique eco\logical niche
B. To regulate the population of other species
C. To maintain the structure of the community
D. To facilitate the process of succession
Question 7
In a population of 1000 bacteria, 80% are resis\tant to antibiotic X. If 200 bacteria are randomly selected for treatment, what is the probability that at least 150 will be resis\tant to antibiotic X?
A. 0.95
B. 0.90
C. 0.85
D. 0.80
Question 8
Which of the following types of nutrition involves the breakdown of complex carbohydrates into simple sugars?
A. Catabolism
B. Anabolism
C. Photosynthesis
D. Digestion
Question 9
Which of the following evolutionary theories proposes that species adapt to their environment through the process of natural selection?
A. Gradualism
B. Punctuated equilibrium
C. Natural selection
D. Saltationism
Question 10
In the context of cell division, what is the primary function of the centrioles during the prophase stage?
A. To form the spindle fibers
B. To organize the chromosomes
C. To divide the cytoplasm
D. To produce the mitotic spindle
Question 11
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 12
A diagram of a human cell is shown below. Identify the part labeled B.
A. Mitochondria
B. Endoplasmic reticulum
C. Golgi apparatus
D. Lysosome
Question 13
A diagram of the human eye is shown below. What is the primary function of the lens?
A. To focus light on the retina
B. To regulate the amount of light entering the eye
C. To produce tears
D. To maintain the shape of the eye
Question 14
In the context of excretion, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Osmosis
B. Active transport
C. Passive transport
D. Diffusion
Question 15
What is the primary function of the Golgi apparatus in eukaryotic cells?
A. Protein synthesis
B. Protein modification
C. Protein transport
D. Protein degradation

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