POST UTME IGBINEDION UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The diagram below represents a cross-section of a plant root. Identify the type of tissue labeled 'A'?
A. Parenchyma
B. Collenchyma
C. Sclerenchyma
D. Xylem
Question 2
A diagram of the human kidney is shown below. What is the function of the part labeled 'B'?
A. To filter waste from the blood.
B. To regulate blood pressure.
C. To produce hormones.
D. To store urine.
Question 3
In a population of 1000 individuals, 50% are homozygous dominant (BB), 40% are heterozygous (Bb), and 10% are homozygous recessive (bb). What is the frequency of the recessive allele (b) in this population?
A. 0.25
B. 0.33
C. 0.40
D. 0.50
Question 4
What is the term for the process by which a cell becomes specialized to perform a specific function?
A. Differentiation
B. Mitosis
C. Meiosis
D. Symbiosis
Question 5
A 45-year-old man is diagnosed with hypertension. His blood pressure is 160/100 mmHg, and his heart rate is 80 beats/min. Which of the following is the most appropriate treatment option?
A. Li\sinopril only
B. Amlodipine only
C. Hydrochlorothiazide only
D. Combination of li\sinopril and amlodipine
Question 6
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.5 per hour, what is the population size after 3 hours?
A. 1000
B. 500
C. 200
D. 50
Question 7
A population of bacteria is growing exponentially. If the initial population is 1000 and the population doubles every 2 hours, what is the population after 6 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 8
The process of osmoregulation in plants involves the movement of water from the roots to the xylem. Which of the following statements is true about the xylem?
A. The xylem is responsible for the transport of sugars from the leaves to the roots.
B. The xylem is responsible for the transport of water from the roots to the leaves.
C. The xylem is responsible for the transport of minerals from the roots to the leaves.
D. The xylem is responsible for the transport of gases from the leaves to the roots.
Question 9
The following diagram shows a cross-section of a plant root. Which part of the root is responsible for absorbing water and minerals from the soil?
A. Root Hair
B. Xylem
C. Phloem
D. Cortex
Question 10
A bacterium has a mutation in its DNA that causes it to produce a toxin. The toxin is encoded by a gene that is located on a plasmid. If the plasmid is 5 kb in size and the gene is 2 kb in size, what is the percentage of the plasmid that is occupied by the gene?
A. 40%
B. 50%
C. 60%
D. 80%
Question 11
The diagram below represents a cross-section of the human eye. Identify the part labeled 'B'?
A. Iris
B. Cornea
C. Lens
D. Retina
Question 12
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
A. 0.6
B. 0.8
C. 0.4
D. 0.9
Question 13
The following diagram shows a titration setup. What is the purpose of the burette?
A. To measure the volume of the acid
B. To measure the volume of the base
C. To mix the acid and base
D. To measure the pH of the solution
Question 14
A researcher is studying the effect of a new pesticide on a population of insects. The pesticide is applied to the insects at a concentration of 10 mg/L. What is the expected effect of this pesticide on the population of insects?
A. \uparrow
B. \downarrow
C. \leftrightarrow
D. \rightarrow
Question 15
A 30-year-old woman is diagnosed with a rare disease that affects the kidneys. The disease is caused by a mutation in a gene that codes for a protein involved in the regulation of blood pressure. What is the likely effect of this mutation on the woman's blood pressure?
A. \downarrow
B. \uparrow
C. \leftrightarrow
D. \rightarrow

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