POST UTME BSU 2025 Biology | Objective

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Question 1
The process by which plants convert carbon dioxide and water into glu\cose and oxygen is called
A. Photosynthesis
B. Respiration
C. Transpiration
D. Evaporation
Question 2
A diagram shows a plant cell with a large vacuole and a small nucleus. What is the function of the vacuole in this cell?
A. Storage of water and nutrients
B. Production of proteins
C. Regulation of cell growth
D. Transport of materials
Question 3
A tissue consists of a mixture of two types of cells: epithelial and connective tissue. Which of the following characteristics is unique to epithelial tissue?
A. Polarity
B. Specialization
C. Regeneration
D. Invasiveness
Question 4
The process of osmoregulation in animals is primarily controlled by which organ?
A. Kidneys
B. Liver
C. Pancreas
D. Adrenal glands
Question 5
In a typical xylem vessel, what is the primary function of the lignin-rich secondary cell wall?
A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of water uptake by the roots
D. To store and transport sugars produced during photosynthesis
Question 6
A 30-year-old man presents with a 5-year history of infertility. His physical examination reveals a BMI of 35. Which of the following is the most likely diagnosis?
A. Varicocele
B. Low Sperm Count
C. Erectile Dysfunction
D. Hypogonadism
Question 7
A researcher is studying the effect of temperature on the rate of respiration in a plant. If the rate of respiration is 10 μmol CO2 s-1 at 20°C, and the rate increases by 2 μmol CO2 s-1 for every 1°C increase in temperature, what is the rate of respiration at 30°C?
A. 12
B. 16
C. 20
D. 24
Question 8
The diagram below represents a cross-section of a plant leaf. Identify the structure labeled E.
A. Stomata
B. Guard cells
C. Palisade cells
D. Spongy cells
Question 9
A 2.0 L flask contains 0.50 M NaCl at 25°C. What is the total number of moles of gas in the flask after the solution is heated to 50°C?
A. 0.50 mol
B. 1.0 mol
C. 1.5 mol
D. 2.0 mol
Question 10
A diagram shows a simple e\cosystem with a producer (plant), a primary consumer (insect), and a secondary consumer (bird). What is the role of the bird in this e\cosystem?
A. Producer
B. Primary consumer
C. Secondary consumer
D. Decomposer
Question 11
The process by which plants convert light energy into chemical energy is called
A. Photosynthesis
B. Respiration
C. Transpiration
D. Evaporation
Question 12
A 35-year-old man presents with a 5-year history of erectile dysfunction. His physical examination reveals a BMI of 30. Which of the following is the most likely diagnosis?
A. Diabetes Mellitus
B. Hypertension
C. Hyperlipidemia
D. Obesity
Question 13
A person is experiencing difficulty breathing due to a respiratory disease. The person's oxygen saturation is 88% and their carbon dioxide levels are elevated. What is the most likely cause of their symptoms?
A. Chronic obstructive pulmonary disease (COPD)
B. Asthma
C. Pneumonia
D. Lung cancer
Question 14
The human body's ability to maintain homeostasis is primarily regulated by which system?
A. Nervous system
B. Circulatory system
C. Respiratory system
D. Endocrine system
Question 15
A population of rabbits is growing at a rate of 20% per year. If the population is currently 1000 individuals, what will be the population size after 5 years?
A. 1250
B. 1875
C. 3125
D. 6250

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