POST UTME UNIBEN 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
B. Diffusion
C. Active transport
D. Passive transport
Question 2
A genetic trait is inherited in an autosomal dominant pattern. What is the probability that a child will inherit the dominant allele if one parent is homozygous dominant and the other parent is heterozygous?
A. \frac{1}{2}
B. \frac{2}{3}
C. \frac{3}{4}
D. \frac{4}{5}
Question 3
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the resulting concentration of the solution?
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M
Question 4
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Cell wall
B. Cytoplasm
C. Nucleus
D. Mitochondria
Question 5
What is the process by which plants release excess water through their leaves?
A. Transpiration
B. Respiration
C. Photosynthesis
D. Osmoregulation
Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.6
B. 0.4
C. 0.2
D. 0.8
Question 7
A diagram of a human eye is shown below. What is the function of the structure labeled 'B'?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 8
A patient is diagnosed with a viral infection that is cau\sing a severe inflammatory response. The patient's doctor orders a series of tests to identify the type of virus and its replication cycle. Which of the following tests would be most useful in identifying the type of virus?
A. PCR
B. ELISA
C. Western blot
D. Viral culture
Question 9
In a population of 1000 individuals, the frequency of the dominant allele is 0.6. What is the expected frequency of the recessive allele?
A. 0.4
B. 0.6
C. 0.8
D. 1.0
Question 10
A diagram shows a cross-section of a plant root with a xylem vessel labeled A and a phloem vessel labeled B. Which of the following is the correct function of the xylem vessel?
A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Storage of starch and proteins
D. Support and structure
Question 11
A 2.5 L solution contains 0.5 M glu\cose. If 1.5 L of this solution is diluted to 3 L, what is the new concentration of glu\cose?
A. 0.25 M
B. 0.5 M
C. 0.75 M
D. 1.0 M
Question 12
A researcher is studying the effect of pH on the activity of the enzyme catalase. If the enzyme is most active at a pH of 7.0, what can be concluded about the enzyme's optimal pH?
A. The enzyme is most active at a pH of 7.0
B. The enzyme is most active at a pH of 5.0
C. The enzyme is most active at a pH of 9.0
D. The enzyme is most active at a pH of 10.0
Question 13
In the human kidney, what is the primary function of the glomerulus?
A. Filtering waste and excess fluids from the blood
B. Regulating blood pressure and electrolyte balance
C. Producing hormones that stimulate red blood cell production
D. Storing waste and excess fluids for excretion
Question 14
Which of the following enzymes is responsible for the breakdown of starch into maltose?
A. Amylase
B. Lactase
C. Maltase
D. Sucrase
Question 15
A person has a damaged sense organ that affects their ability to perceive certain sounds. Which of the following sense organs is most likely affected?
A. Ear
B. Eye
C. Nose
D. Tongue

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