POST UTME NOUN 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the process of osmoregulation, which of the following is a primary mechanism for maintaining water balance in the body?
A. Active transport of ions across cell membranes
B. Passive transport of water through osmosis
C. Excretion of excess water through the kidneys
D. Ingestion of water through drinking
Question 2
Which of the following types of tissue is characterized by its ability to contract and relax?
A. Epithelial tissue
B. Connective tissue
C. Muscle tissue
D. Nervous tissue
Question 3
A 35-year-old female patient is diagnosed with type 2 diabetes mellitus. Which of the following is a characteristic feature of this condition?
A. Hyperglycemia due to insulin resis\tance
B. Hypoglycemia due to insulin deficiency
C. Hyperinsulinemia due to insulin excess
D. Hypoinsulinemia due to insulin deficiency
Question 4
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 5
In the process of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
A. To conserve water by reabsorbing water from the filtrate
B. To excrete excess salt by producing a highly concentrated urine
C. To regulate electrolyte balance by adjusting the amount of ions in the urine
D. To produce a highly acidic urine to help eliminate excess hydrogen ions
Question 6
The diagram below shows a cross-section of a kidney. Which of the following structures is responsible for filtering waste products from the blood?
A. Renal cortex
B. Nephron
C. Renal medulla
D. Collecting duct
Question 7
The diagram below shows a graph of the relationship between the concentration of a subs\tance and the rate of diffusion. Which of the following is the correct interpretation of the graph?
A. The rate of diffusion increases as the concentration of the subs\tance increases
B. The rate of diffusion decreases as the concentration of the subs\tance increases
C. The rate of diffusion remains cons\tant as the concentration of the subs\tance increases
D. The rate of diffusion is inversely proportional to the concentration of the subs\tance
Question 8
A diagram of the xylem and phloem tissues in a plant stem is shown below. Which of the following is the primary function of the xylem tissue?
A. Transport of water and minerals from roots to leaves
B. Transport of sugars and other organic compounds from leaves to roots
C. Support and structure for the plant stem
D. Storage of food and water in the plant stem
Question 9
A patient is diagnosed with a bacterial infection. Which of the following is a characteristic of the bacterial cell wall?
A. Presence of a nuclear membrane
B. Presence of a cell wall composed of peptidoglycan
C. Presence of flagella for motility
D. Presence of a large amount of cytoplasm
Question 10
In the context of respiration, what is the term for the process by which oxygen is transported from the lungs to the body's cells?
A. Oxygenation
B. Deoxygenation
C. Respiration
D. Perfusion
Question 11
A hormone is a chemical messenger that is produced by glands in the \endocrine system. Which hormone is responsible for regulating blood sugar levels?
A. Insulin
B. Glucagon
C. Adrenaline
D. Thyroxine
Question 12
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss.
B. The cell will swell due to water uptake.
C. The cell will remain unchanged.
D. The cell will burst due to osmotic pressure.
Question 13
Which of the following organs is responsible for the exchange of oxygen and carbon dioxide in the human body?
A. Lungs
B. Heart
C. Liver
D. Kidneys
Question 14
In a eukaryotic cell, the process of mitosis involves the separation of chromosomes into two daughter cells. Which stage of mitosis is characterized by the condensation of chromosomes and the formation of the spindle apparatus?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 15
A 2.5 L flask contains 0.5 M HCl. If 2.0 g of NaOH is added to the flask, what is the concentration of the resulting solution?
A. 0.2 M
B. 0.4 M
C. 0.6 M
D. 0.8 M

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