POST UTME WELLSPRING UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of digestion in the human body involves the breakdown of food into smaller molecules, which are then absorbed into the bloodstream and transported to the liver for _______________________.
A. storage and distribution
B. metabolism and utilization
C. excretion and elimination
D. synthesis and production
Question 2
A diagram of a human eye is shown below. What is the function of the part labeled 'B'?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 3
A 35-year-old female presents with a 6-month history of fatigue, weight loss, and abdominal pain. Laboratory tests reveal a hemoglobin level of 8 g/dL and a mean corpuscular volume (MCV) of 80 fL. What is the most likely diagnosis?
A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Sickle cell anemia
Question 4
A 50-g sample of a subs\tance is dissolved in 100 mL of water. What is the molarity of the solution?
A. 0.5 M
B. 1.0 M
C. 2.0 M
D. 5.0 M
Question 5
In the classification of living things, what is the primary criterion used to distinguish between prokaryotes and eukaryotes?
A. Cell wall composition
B. Presence of mitochondria
C. Cell membrane structure
D. DNA organization
Question 6
In a photosynthetic pathway, which of the following is the primary function of the enzyme RuBisCO?
A. Fixing CO2 into a 3-carbon molecule
B. Reducing NADP+ to NADPH
C. Generating ATP from light energy
D. Regenerating RuBP from Ru5P and CO2
Question 7
In the context of gas exchange, what is the primary function of the alveolar-capillary membrane?
A. To regulate the pH of the blood
B. To facilitate the diffusion of oxygen and carbon dioxide
C. To produce surfac\tant for lung expansion
D. To filter out pathogens from the blood
Question 8
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of a certain enzyme. If 20% of the population is homozygous recessive, what is the frequency of the recessive allele?
A. 0.15
B. 0.20
C. 0.25
D. 0.30
Question 9
The diagram below shows the structure of a plant cell. What is the function of the cell labeled 'A'?
A. Stores genetic information
B. Provides structural support
C. Regulates cell growth
D. Produces proteins
Question 10
A 40-year-old female presents with a 2-year history of progressive dysphagia and weight loss. Esophagogastroduodenoscopy (EGD) reveals a stricture at the level of the lower esophagus. What is the most likely diagnosis?
A. Esophageal cancer
B. Gastroesophageal reflux disease (GERD)
C. Esophageal stricture
D. Achalasia
Question 11
A 30-year-old woman presents with a 2-year history of progressive shortness of breath, fatigue, and swelling of the legs. Physical examination reveals a characteristic 'S3' heart sound and a low ejection \fraction. Echocardiogram reveals a dilated left ventricle with a reduced ejection \fraction. Which of the following is the most likely diagnosis?
A. Hypertrophic cardiomyopathy
B. Dilated cardiomyopathy
C. Restrictive cardiomyopathy
D. Arrhythmogenic right ventricular cardiomyopathy
Question 12
The process by which an organism's cells become specialized to perform specific functions is called what?
A. Mitosis
B. Meiosis
C. Differentiation
D. Osmosis
Question 13
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if five specific conditions are met. Which of the following is NOT one of these conditions?
A. Large population size
B. Random mating
C. No mutation
D. No genetic drift
Question 14
In the process of photosynthesis, what is the net result of the light-dep\endent reactions?
A. Production of ATP and NADPH
B. Production of glu\cose and oxygen
C. Production of water and carbon dioxide
D. Production of ATP and oxygen
Question 15
A diagram of the human circulatory system is shown below. What is the function of the coronary arteries?
A. To supply oxygen to the brain and other vital organs
B. To regulate blood pressure
C. To supply oxygen to the heart muscle itself
D. To filter waste products from the blood

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