POST UTME UNN 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 35-year-old patient is diagnosed with type 2 diabetes mellitus. Which of the following is a characteristic feature of this condition?
A. Hyperglycemia due to insulin deficiency
B. Hypoglycemia due to insulin excess
C. Hyperglycemia due to insulin resis\tance
D. Hypoglycemia due to insulin deficiency
Question 2
In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate the amount of water in the body
B. To regulate the amount of electrolytes in the body
C. To regulate the pH of the blood
D. To regulate the amount of glu\cose in the blood
Question 3
A patient has been diagnosed with a bacterial infection. Which of the following is the primary mechanism by which the immune system responds to this infection?
A. Phagocytosis
B. Complement activation
C. Antibody production
D. Cytokine release
Question 4
A diagram of the human reproductive system is shown below. Which of the following is a function of the ovary?
A. The production of sperm.
B. The storage of sperm.
C. The production of eggs.
D. The implantation of the fertilized egg.
Question 5
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 6
A 30-year-old patient is experiencing symptoms of irritable bowel syndrome (IBS). Which of the following is a characteristic feature of this condition?
A. Abdominal pain and bloating
B. Diarrhea and constipation
C. Nausea and vomiting
D. Weight loss and fatigue
Question 7
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 8
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Hormonal regulation
B. Ion exchange with the environment
C. Active transport of ions across the renal tubules
D. Passive diffusion of ions through the renal tubules
Question 9
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating the pituitary gland?
A. To produce hormones that stimulate the pituitary gland
B. To produce hormones that inhibit the pituitary gland
C. To regulate the release of hormones from the pituitary gland
D. To produce hormones that have no effect on the pituitary gland
Question 10
A 25-year-old woman presents with primary amenorrhea and a history of recurrent miscarriages. Her karyotype is 45,X. What is the most likely cause of her condition?
A. Turner syndrome
B. Klinefelter syndrome
C. Androgen insensitivity syndrome
D. Swyer syndrome
Question 11
In a population of 1000 individuals, 20% are heterozygous for a particular gene, while 80% are homozygous recessive. If 10 individuals are randomly selected, what is the probability that at least 2 of them are heterozygous?
A. 0.05
B. 0.10
C. 0.20
D. 0.30
Question 12
In the context of xylem transport, what is the primary function of the pit membrane?
A. To regulate water flow between adjacent tracheids
B. To facilitate the transfer of minerals from the xylem sap to the surrounding tissues
C. To prevent the collapse of the xylem vessels under negative pressure
D. To allow for the exchange of gases between the xylem and the surrounding tissues
Question 13
In a typical animal cell, the \endoplasmic reticulum (ER) is involved in the synthesis of proteins and lipids. Which of the following statements is true about the ER?
A. The ER is a type of organelle found in plant cells only.
B. The ER is responsible for the breakdown of proteins and lipids.
C. The ER is involved in the synthesis of proteins and lipids.
D. The ER is a type of membrane-bound organelle found in animal cells only.
Question 14
The excretory system in humans is primarily responsible for what function?
A. Regulation of body temperature
B. Removal of waste products
C. Production of hormones
D. Digestion of food
Question 15
A cell has a membrane potential of -70 mV. If the concentration of K+ ions outside the cell is 5 mM, what is the equilibrium potential for K+?
A. -80 mV
B. -70 mV
C. -60 mV
D. -50 mV

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