POST UTME UNIPORT 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. To produce xylem sap
B. To store food and water
C. To facilitate the transport of water and minerals
D. To produce xylem fibers
Question 2
A population of bacteria is growing exponentially in a nutrient-rich environment. If the initial population size is 100 bacteria and the growth rate is 20% per hour, what will be the population size after 5 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 3
Which of the following is an example of a symbiotic relationship between two organisms?
A. Predator-prey relationship
B. Mutualism between bees and flowers
C. Competition between two species
D. Commensalism between a bird and a tree
Question 4
In the context of classification of living things, which of the following kingdoms is characterized by the presence of true branching in their life cycle?
A. Fungi
B. Bacteria
C. Protista
D. Chromista
Question 5
A diagram of the human excretory system is shown below. What is the primary function of the kidneys?
A. Filtering waste from the blood
B. Regulating blood pressure
C. Producing hormones
D. Absorbing nutrients
Question 6
The process by which water moves through a plant, from the roots to the leaves, is known as
A. transpiration
B. photosynthesis
C. respiration
D. translocation
Question 7
A plant cell has a cell wall, a large central vacuole, and a small nucleus. What is the function of the cell wall?
A. To provide structural support
B. To regulate the movement of materials
C. To synthesize proteins
D. To store genetic information
Question 8
The transport of water and minerals from the roots to the leaves in plants occurs through which of the following systems?
A. Phloem
B. Xylem
C. Cortex
D. Pith
Question 9
A population of rabbits is growing according to the \logistic growth model. If the carrying capacity is 1000 rabbits and the initial population is 100, what is the population after 5 generations?
A. 500
B. 750
C. 900
D. 1000
Question 10
A diagram of the human respiratory system is shown below. What is the primary function of the alveoli?
A. Gas exchange
B. Air filtration
C. Sound production
D. Temperature regulation
Question 11
In a desert e\cosystem, the primary producers are cacti and succulents. What is the role of these plants in the desert food chain?
A. Primary consumers
B. Decomposers
C. Producers
D. Omnivores
Question 12
A human kidney filters waste products from the blood and regulates the amount of water in the body. What is the name of the process by which the kidney regulates the amount of water in the body?
A. Osmosis
B. Diffusion
C. Active transport
D. Countercurrent exchange
Question 13
A plant has a root system with a total surface area of 100 cm^2. If the root system is exposed to a nutrient solution with a concentration of 10^-3 M, what is the total amount of nutrients absorbed by the plant in 1 hour?
A. 0.36
B. 3.6
C. 36
D. 360
Question 14
A person has a body temperature of 37°C. If the temperature is measured u\sing a thermometer with a sensitivity of 0.1°C, what is the minimum detectable change in temperature?
A. 0.001
B. 0.01
C. 0.1
D. 1
Question 15
In a population of 1000 bacteria, 80% are susceptible to a particular antibiotic. If 50% of the susceptible bacteria are killed by the antibiotic, what is the new ratio of susceptible to total bacteria?
A. 0.4
B. 0.6
C. 0.8
D. 0.9

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