POST UTME UNILORIN 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 35-year-old woman with a history of hypertension and hyperlipidemia presents with a 2-week history of chest pain and shortness of breath. Which of the following conditions is most likely responsible for her symptoms?
A. Acute coronary syndrome
B. Pulmonary embolism
C. Aortic dissection
D. Cardiac tamponade
Question 2
In the context of eco\logy, what is the term for the relationship between two species in which one species benefits and the other is harmed?
A. Mutualism
B. Commensalism
C. Parasitism
D. Predation
Question 3
In a population of 1000 individuals, 200 are infected with a disease that has a 20% mortality rate. If 50% of the infected individuals are asymptomatic, what is the expected number of deaths due to the disease?
A. 80
B. 100
C. 120
D. 140
Question 4
In a photosynthetic pathway, which of the following pigments is primarily responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins
Question 5
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'C'?
A. To expand and contract during breathing
B. To regulate air pressure
C. To separate oxygen from carbon dioxide
D. To produce mucus
Question 6
What is the primary function of the mitochondria in a cell?
A. To synthesize proteins
B. To store genetic information
C. To generate energy for the cell
D. To regulate cell growth
Question 7
The process of excretion in plants involves the removal of excess water and salts through the
A. roots
B. stems
C. leaves
D. flowers
Question 8
A diagram of the human respiratory system is shown below. Which part of the system is responsible for exchanging oxygen and carbon dioxide?
A. Lungs
B. Trachea
C. Bronchi
D. Alveoli
Question 9
Which of the following is an example of a symbiotic relationship?
A. Predator-prey relationship
B. Competitive relationship
C. Mutualistic relationship
D. Parasitic relationship
Question 10
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, calculate the frequency of the dominant allele 'R'.
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 11
The process of digestion in the human body \begins in the
A. mouth
B. esophagus
C. stomach
D. small intestine
Question 12
A diagram of the human eye is shown below. Which of the following statements is true regarding the structure labeled 'A'?
A. It is responsible for detecting light
B. It is responsible for focu\sing light
C. It is responsible for detecting color
D. It is responsible for detecting movement
Question 13
A 30-year-old woman with a history of anxiety presents with a 2-week history of insomnia and restlessness. Which of the following medications is most likely responsible for her symptoms?
A. Benzodiazepines
B. Non-benzodiazepine sedatives
C. Selective serotonin reuptake inhibitors (SSRIs)
D. Monoamine oxidase inhibitors (MAOIs)
Question 14
The process of photosynthesis in plants occurs in the
A. roots
B. stems
C. leaves
D. flowers
Question 15
The process by which plants transport water and minerals from the roots to the leaves is called
A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion

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