POST UTME UNIPORT 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human circulatory system is shown below. Which of the following vessels is responsible for carrying oxygenated blood from the lungs to the heart?
A. A
B. B
C. C
D. D
Question 2
A bio\logist is studying the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
B. Chloroplast
C. Endoplasmic Reticulum
D. Lysosome
Question 3
A 40-year-old male patient presents with symptoms of hypertension. Which hormone is most likely responsible for this condition?
A. Renin
B. Aldosterone
C. Angioten\sin II
D. Antidiuretic hormone
Question 4
A diagram of the human eye is shown below. What is the primary function of the lens in the eye?
A. To focus light onto the retina
B. To regulate the amount of light entering the eye
C. To detect changes in color
D. To produce tears
Question 5
Asexual reproduction in plants can occur through the production of
A. Seeds
B. Spores
C. Buds
D. Rhizomes
Question 6
A diagram of the human nervous system is shown below. Which of the following nerves is responsible for transmitting sensory information from the skin to the brain?
A. A
B. B
C. C
D. D
Question 7
A species is said to be extinct when its last individual dies. Which of the following statements is TRUE?
A. A species is said to be extinct when its population size decreases.
B. A species is said to be extinct when its population size increases.
C. A species is said to be extinct when its last individual dies.
D. A species is said to be extinct when its population size remains cons\tant.
Question 8
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπηυσες (Δπηυσες) complex. What is the primary function of the Δπηυσες complex in this process?
A. To condense the chromosomes
B. To break down the nuclear envelope
C. To separate the sister chromatids
D. To initiate DNA replication
Question 9
A 10-mL sample of a solution containing 0.1 M NaCl is mixed with 20 mL of a solution containing 0.2 M KNO3. What is the concentration of Cl- ions in the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 10
In a typical xylem vessel, what is the primary function of the lignin component in the 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 transpiration
D. To store starch and other nutrients
Question 11
A diagram of the human excretory system is shown below. Which of the following organs is responsible for filtering waste from the blood?
A. A
B. B
C. C
D. D
Question 12
A patient is diagnosed with Δγλελλα (Δγλελλα) sepsis. The patient's symptoms include fever, chills, and difficulty breathing. What is the likely cause of these symptoms?
A. Infection of the blood
B. Inflammation of the organs
C. Damage to the blood vessels
D. Reaction to a foreign subs\tance
Question 13
The microorganism responsible for the spoilage of milk is
A. Escherichia coli
B. Staphylococcus aureus
C. Bacillus subtilis
D. Lactobacillus acidophilus
Question 14
A 35-year-old female patient undergoes a surgical procedure to remove a tumor from her kidney. Which type of cell division is most likely to occur in the remaining renal tissue?
A. Mitosis
B. Meiosis
C. Apoptosis
D. Endoreduplication
Question 15
A diagram of a typical terrestrial e\cosystem is shown below. What is the primary role of the decomposers in this e\cosystem?
A. To produce nutrients for the plants
B. To break down dead organic matter
C. To regulate the pH of the soil
D. To absorb excess water

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