POST UTME OAU 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of gas exchange, what is the primary function of the alveolar-capillary membrane?
A. To regulate the pH of the blood
B. To facilitate the diffusion of oxygen into the blood
C. To remove carbon dioxide from the blood
D. To regulate the temperature of the blood
Question 2
The process of asexual reproduction in which an organism produces offspring that are genetically identical to itself is called?
A. Mitosis
B. Meiosis
C. Binary Fission
D. Budding
Question 3
A researcher is studying the effect of pH on the activity of an enzyme. She measures the activity of the enzyme at different pH levels and plots the data on a graph. Which of the following is the most likely shape of the graph?
A. Bell-shaped curve
B. U-shaped curve
C. S-shaped curve
D. Linear curve
Question 4
The diagram below shows the structure of a human kidney. Which part of the kidney is responsible for filtering waste products from the blood?
A. Renal Cortex
B. Renal Medulla
C. Renal Pelvis
D. Ureter
Question 5
In a tropical rainforest e\cosystem, the presence of a large population of herbivores can lead to a decrease in the population of a dominant tree species. This is an example of a(n) _______________.
A. predator-prey cycle
B. trophic cascade
C. competition for resources
D. mutualism
Question 6
In the classification of living things, which of the following is an example of a domain?
A. Kingdom
B. Phylum
C. Domain
D. Species
Question 7
A patient is diagnosed with a condition that affects the regulation of blood pressure. Which of the following hormones is primarily responsible for this regulation?
A. Adrenaline
B. Insulin
C. Aldosterone
D. Angioten\sin II
Question 8
A genetic cross between two pea plants with the genotype _______________ and _______________ would produce offspring with the following phenotypes:
A. Tt x Tt
B. Tt x tt
C. Tt x Tt
D. tt x tt
Question 9
A 2-year-old child is diagnosed with a rare genetic disorder that affects the development of the pancreas. Which of the following is a likely consequence of this disorder?
A. Diabetes mellitus
B. Pancreatitis
C. Pancreatic cancer
D. Pancreatic cysts
Question 10
A diagram of a nervous system is shown below. Identify the part labeled A.
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord
Question 11
A 40-year-old male patient presents with symptoms of polyuria, polydipsia, and weight loss. His blood glu\cose level is 250 mg/dL. Which of the following is the most likely diagnosis?
A. Type 1 Diabetes Mellitus
B. Type 2 Diabetes Mellitus
C. MODY \( Maturity-Onset Diabetes of the Young \)
D. Secondary Diabetes
Question 12
In the process of mitosis, what is the primary function of the centrioles?
A. To synthesize DNA
B. To break down chromosomes
C. To form the spindle fibers
D. To regulate cell division
Question 13
In a photosynthetic pathway, which of the following pigments is primarily responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins
Question 14
A diagram of a human nervous system is shown below. What is the function of the part labeled 'D'?
A. processes sensory information
B. transmits signals to the muscles
C. regulates the body's autonomic functions
D. detects changes in the environment
Question 15
The diagram below shows the structure of a human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Lens
C. Retina
D. Iris

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