POST UTME BELLS UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 50-year-old woman has been experiencing symptoms of irritable bowel syndrome (IBS) for the past 5 years. Her symptoms include abdominal pain, bloating, and changes in bowel movements. Which of the following is the most likely cause of her symptoms?
A. Inflammatory bowel disease (IBD)
B. Gastroesophageal reflux disease (GERD)
C. Functional dyspepsia
D. Small intestine bacterial overgrowth (SIBO)
Question 2
In the context of evolutionary bio\logy, what is the primary mechanism driving the process of speciation?
A. Genetic drift
B. Natural selection
C. Mutation
D. Gene flow
Question 3
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP from ADP and Pi
B. To produce NADH and FADH2
C. To reduce oxygen to water
D. To increase the pH of the mitochondria
Question 4
In a population of 1000 individuals, 70% are heterozygous for a particular gene. What is the expected frequency of the recessive allele in the population?
A. 0.05
B. 0.10
C. 0.15
D. 0.20
Question 5
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Active transport of ions across the renal tubules
B. Passive diffusion of ions across the renal tubules
C. Filtration of ions from the blood into the renal tubules
D. Reabsorption of ions from the renal tubules back into the blood
Question 6
A 2.5-L flask contains 3.2 g of CO2 at 27°C. What is the partial pressure of CO2 in the flask?
A. 0.75 atm
B. 1.25 atm
C. 2.5 atm
D. 5.0 atm
Question 7
The structure of the human eye is an example of which type of tissue?
A. Connective tissue
B. Epithelial tissue
C. Muscle tissue
D. Nervous tissue
Question 8
A cell is in the process of dividing. Which of the following is the primary function of the mitotic spindle during this process?
A. Separation of chromosomes
B. Attachment of chromosomes to the spindle fibers
C. Movement of chromosomes to the poles
D. Formation of the nuclear envelope
Question 9
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Protein modification and transport
D. Cell division
Question 10
A microorganism is isolated from a patient with a severe infection. The microorganism is found to be resis\tant to multiple antibiotics. Which of the following is the most likely explanation for this resis\tance?
A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation in the target gene
D. Selection pressure
Question 11
Which of the following tissues is primarily responsible for the production of mucus in the respiratory system?
A. Epithelial tissue
B. Connective tissue
C. Muscle tissue
D. Nervous tissue
Question 12
A 40-year-old woman has been experiencing symptoms of fibromyalgia for the past 5 years. Her symptoms include widespread pain, fatigue, and sleep disturbances. Which of the following is the most likely cause of her symptoms?
A. Central nervous system disorder
B. Musculoskeletal disorder
C. Endocrine disorder
D. Gastrointestinal disorder
Question 13
A diagram shows a plant with a \single cotyledon. What is the most likely type of plant?
A. Dicotyledonous plant
B. Monocotyledonous plant
C. Gymnosperm
D. Angiosperm
Question 14
In the transport system of plants, what is the primary function of the xylem?
A. To transport water and minerals from the roots to the leaves
B. To transport sugars and other organic compounds from the leaves to the rest of the plant
C. To transport gases such as oxygen and carbon dioxide throughout the plant
D. To transport waste products away from the plant cells
Question 15
A diagram of a simple e\cosystem is shown below. What is the primary role of the producer in this e\cosystem?
A. Consumer
B. Decomposer
C. Producer
D. Scavenger

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