POST UTME LEAD CITY UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Which of the following hormones is responsible for stimulating the breakdown of glycogen to glu\cose in the liver?
A. Glucagon
B. Insulin
C. Adrenaline
D. Thyroxine
Question 2
In the process of cellular respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from glu\cose
B. To break down glu\cose into carbon dioxide and water
C. To regulate the cell's pH levels
D. To synthesize proteins from amino acids
Question 3
A researcher is studying the effect of antibiotics on bacterial growth. Which of the following is a characteristic of antibiotic resis\tance?
A. Increased bacterial growth rate
B. Decreased bacterial growth rate
C. Ability of bacteria to produce enzymes that inactivate antibiotics
D. Ability of bacteria to develop a thick cell wall
Question 4
A bio\logist observes that a certain species of bird has a unique beak shape that allows it to feed on a specific type of food. Which of the following best describes this phenomenon?
A. Adaptation
B. Mutualism
C. Competition
D. Symbiosis
Question 5
What is the primary function of the roots in plants?
A. To synthesize chlorophyll from amino acids
B. To regulate the plant's water potential
C. To transport water and minerals from the soil to the leaves
D. To synthesize proteins from amino acids
Question 6
A diagram shows a human kidney with a blood vessel labeled 'Renal Artery'. What is the function of the renal artery?
A. To pump blood to the liver
B. To pump blood to the lungs
C. To pump blood to the brain
D. To pump blood to the rest of the body
Question 7
In a typical terrestrial e\cosystem, what is the primary function of the xylem tissue in plants?
A. Transport of water and minerals from the roots to the leaves
B. Production of glu\cose through photosynthesis
C. Storage of nutrients and water in the stems
D. Regulation of temperature in the plant body
Question 8
A population of rabbits is growing according to the \logistic growth model. The initial population size is 100, and the carrying capacity is 1000. If the growth rate is 0.2, what is the population size after 5 years?
A. 500
B. 750
C. 900
D. 950
Question 9
A bio\logist is studying the classification of living things. Which of the following is an example of a domain?
A. Kingdom
B. Phylum
C. Domain
D. Class
Question 10
In a forest e\cosystem, the presence of a keystone species can have a cascading effect on the entire food chain. Which of the following best describes the role of a keystone species?
A. A species that is a primary consumer in the food chain.
B. A species that has a large population size and is a major predator.
C. A species that plays a unique role in the e\cosystem and has a disproportionate impact on the environment.
D. A species that is a secondary consumer in the food chain.
Question 11
A plant cell has a vacuole that contains 0.5 M sucrose. If 10 mL of the vacuolar sap is removed and diluted to 100 mL, what is the concentration of sucrose in the resulting solution?
A. 0.005 M
B. 0.01 M
C. 0.05 M
D. 0.1 M
Question 12
A plant with a mutation in the Xylem sap transport system shows a reduction in water transport. Which of the following is a likely consequence of this mutation?
A. Increased water loss through transpiration
B. Reduced water transport to the leaves
C. Increased water uptake from the roots
D. No effect on water transport
Question 13
Which of the following types of classification is based on the structure and organization of living organisms?
A. Phy\logenetic classification
B. Morpho\logical classification
C. Biogeographical classification
D. Eco\logical classification
Question 14
A diagram of a simple circuit is shown below. Identify the part labeled 'B'.
A. Resistor
B. Capacitor
C. Inductor
D. Battery
Question 15
A patient is diagnosed with a kidney stone. Which of the following is a common cause of kidney stones?
A. Dehydration
B. Genetic predisposition
C. Diet high in oxalate
D. All of the above

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