POST UTME UNN 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the process of mitosis, what is the primary function of the anaphase stage?
A. To separate the sister chromatids and move them to opposite poles of the cell
B. To condense the chromosomes and prepare them for separation
C. To decondense the chromosomes and prepare them for cell division
D. To repair any damaged chromosomes before cell division
Question 2
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To pump protons across the mitochondrial inner membrane
C. To reduce NADH and FADH2 to NAD+ and FAD
D. To produce water and carbon dioxide as byproducts
Question 3
A 35-year-old woman is diagnosed with hypertension. Her blood pressure is 160/100 mmHg. What is the most likely cause of her hypertension?
A. Kidney disease
B. Heart disease
C. Liver disease
D. Obesity
Question 4
In the human kidney, what is the primary function of the nephron?
A. To filter waste products from the blood
B. To regulate the amount of water in the body
C. To produce hormones that stimulate the production of red blood cells
D. To store excess ions and minerals for later use
Question 5
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Active transport of ions across the renal tubules
B. Passive diffusion of ions across the renal tubules
C. Excretion of excess ions in the urine
D. Reabsorption of ions from the filtrate
Question 6
A 2-year-old child is diagnosed with acute otitis media. The child's tympanic membrane is bulging, and the middle ear is filled with fluid. What is the most likely cause of this condition?
A. Viral infection
B. Bacterial infection
C. Fungal infection
D. Allergies
Question 7
A 5.0 μL sample of a solution containing 0.1 M glu\cose is injected into a spectrophotometer. The absorbance of the solution is 0.5. What is the concentration of the glu\cose solution?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M
Question 8
What is the primary difference between a simple epithelium and a stratified epithelium?
A. Simple epithelium has a \single layer of cells, while stratified epithelium has multiple layers
B. Simple epithelium is found in the skin, while stratified epithelium is found in the lining of the digestive tract
C. Simple epithelium is responsible for absorption, while stratified epithelium is responsible for secretion
D. Simple epithelium is found in the lining of the blood vessels, while stratified epithelium is found in the lining of the lungs
Question 9
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 stem
D. Regulation of stomatal opening and clo\sing
Question 10
A 2.5 g sample of a compound containing only carbon and hydrogen is burned in a combustion apparatus. The volume of carbon dioxide produced is 2.5 L at 25°C and 1 atm. What is the empirical formula of the compound?
A. CH2
B. C2H4
C. C3H6
D. C4H8
Question 11
A patient with a blood pH of 7.2 is administered a solution of 0.9% NaCl. If the patient's blood volume is 5 L, and the solution is administered at a rate of 100 mL/min, what is the expected change in blood pH after 30 minutes?
A. 7.1
B. 7.3
C. 7.4
D. 7.5
Question 12
In the process of photosynthesis, what is the primary reac\tant that is converted into glu\cose?
A. Carbon dioxide
B. Water
C. Glu\cose
D. Oxygen
Question 13
A 20-kg object is attached to a horizontal spring with a force cons\tant of 100 N/m. If the object is displaced by 0.2 m from its equilibrium position, what is the magnitude of the restoring force?
A. 20 N
B. 40 N
C. 80 N
D. 100 N
Question 14
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 species is most likely to be a keystone species?
A. Owl
B. Deer
C. Beaver
D. Wolf
Question 15
A patient presents with symptoms of fever, headache, and body aches. A blood smear reveals the presence of ring-shaped parasites. What is the most likely diagnosis?
A. Malaria
B. Typhoid fever
C. Lyme disease
D. Leptospirosis

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