POST UTME UNIBEN 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 30-year-old woman presents with a 6-month history of recurrent episodes of abdominal pain and diarrhea. Her stool culture shows the presence of Escherichia coli. What is the likely diagnosis?
A. Irritable bowel syndrome
B. Inflammatory bowel disease
C. Gastroenteritis
D. Bacterial dysentery
Question 2
The nervous system consists of the central nervous system (CNS) and the peripheral nervous system (PNS).
A. True
B. False
C. The nervous system consists of the central nervous system (CNS) and the autonomic nervous system (ANS)
D. The nervous system consists of the peripheral nervous system (PNS) and the autonomic nervous system (ANS)
Question 3
The process by which plants convert light energy into chemical energy is known as
A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation
Question 4
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 5
A 2.5 L solution of 0.1 M NaCl is diluted to a total volume of 5 L. What is the concentration of NaCl in the final solution?
A. 0.02 M
B. 0.05 M
C. 0.1 M
D. 0.2 M
Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.64
B. 0.36
C. 0.48
D. 0.16
Question 7
A 0.1 M solution of NaOH is mixed with a 0.1 M solution of HCl. What is the pH of the resulting solution?
A. 1
B. 7
C. 10
D. 14
Question 8
The type of reproduction that involves the fusion of male and female gametes is known as
A. Asexual Reproduction
B. Sexual Reproduction
C. Binary Fission
D. Budding
Question 9
The process of gas exchange in the lungs involves the diffusion of oxygen from the alveoli into the blood and the diffusion of carbon dioxide from the blood into the alveoli. Which of the following best describes the mechanism by which oxygen diffuses into the blood?
A. Oxygen binds to hemoglobin in red blood cells
B. Oxygen diffuses through the alveolar-capillary membrane
C. Oxygen is transported by the bloodstream to the heart
D. Oxygen is stored in the lungs for later use
Question 10
The process of digestion in the small intestine involves the breakdown of proteins into peptides and amino acids.
A. True
B. False
C. The process of digestion in the small intestine involves the breakdown of carbohydrates into glu\cose
D. The process of digestion in the small intestine involves the breakdown of fats into fatty acids and glycerol
Question 11
The type of tissue that is composed of a mixture of nerve and muscle cells is known as
A. Connective Tissue
B. Epithelial Tissue
C. Muscle Tissue
D. Nervous Tissue
Question 12
The process of digestion involves the breakdown of large molecules of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes plays a key role in the digestion of proteins?
A. Amylase
B. Lipase
C. Tryp\sin
D. Lactase
Question 13
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is NOT a byproduct of photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Water
Question 14
A patient is diagnosed with a condition characterized by the presence of abnormal proteins in the brain. Which of the following is a likely cause of this condition?
A. A genetic mutation in the gene encoding the protein.
B. A viral infection that causes the production of abnormal proteins.
C. A bacterial infection that leads to inflammation in the brain.
D. A nutritional deficiency that affects protein synthesis.
Question 15
A diagram of the human eye is shown below. Which of the following structures is responsible for detecting light and initiating the visual signal?
A. The cornea.
B. The iris.
C. The retina.
D. The lens.

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