POST UTME LEAD CITY UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The human body is composed of various systems, including the circulatory, respiratory, and nervous systems. Which of the following is a function of the circulatory system?
A. Transportation of oxygen and nutrients to cells
B. Removal of waste products from the body
C. Regulation of body temperature
D. Production of hormones
Question 2
The nervous system of an organism is responsible for transmitting and proces\sing information. Which of the following types of neurons is primarily responsible for transmitting sensory information to the brain?
A. Motor neurons
B. Sensory neurons
C. Interneurons
D. Glial cells
Question 3
A 2.5 g sample of a subs\tance is dissolved in 50 mL of water. The solution is then titrated with 0.1 M HCl. If 25 mL of HCl is required to reach the equivalence point, what is the molar mass of the subs\tance?
A. 100 g/mol
B. 150 g/mol
C. 200 g/mol
D. 250 g/mol
Question 4
The genetic principle that states that each gene has two alleles is
A. M\endel's Law of Segregation
B. M\endel's Law of Indep\endent Assortment
C. Hardy-Weinberg Principle
D. Incomplete Dominance
Question 5
The process of digestion in the human body involves the breakdown of food into smaller molecules. Which of the following enzymes is responsible for breaking down proteins?
A. Amylase
B. Lipase
C. Tryp\sin
D. Lactase
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. 0.64
B. 0.36
C. 0.48
D. 0.16
Question 7
The sense organ responsible for detecting changes in sound pressure is
A. Eardrum
B. Cochlea
C. Auditory Nerve
D. Stapes Bone
Question 8
The process by which an organism's genetic information is passed from one generation to the next is called _______
A. heredity
B. variation
C. mutation
D. genetics
Question 9
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from the roots to the leaves
B. Production of sugars through photosynthesis
C. Storage of nutrients and water in the plant
D. Regulation of plant growth and development
Question 10
In the process of cell division, what is the primary function of the spindle fibers?
A. To separate the chromosomes during mitosis
B. To regulate the rate of cell growth
C. To produce sugars through photosynthesis
D. To detect changes in light intensity and regulate plant growth
Question 11
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a by-product of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Question 12
The human body is susceptible to various diseases, including bacterial, viral, and fungal infections. Which of the following is a type of immune response that involves the activation of immune cells to fight off pathogens?
A. Innate immunity
B. Adaptive immunity
C. Humoral immunity
D. Cell-mediated immunity
Question 13
The diagram below shows the structure of a plant root.
A. The xylem is responsible for transporting water and minerals.
B. The phloem is responsible for transporting sugars and amino acids.
C. The root hair cells are responsible for absorbing water and minerals.
D. The root cap is responsible for protecting the root tip.
Question 14
A cell is placed in a solution with a pH of 4. If the cell has a membrane potential of -50 mV, what is the concentration of hydrogen ions in the solution?
A. 10^-4 M
B. 10^-5 M
C. 10^-6 M
D. 10^-7 M
Question 15
The process of osmoregulation in bacteria involves the transport of ions across the cell membrane. Which of the following transport mechanisms is primarily responsible for maintaining the osmotic balance in E. coli?
A. Proton motive force
B. Potassium-sodium antiporter
C. Glu\cose symporter
D. ATP-dep\endent pumps

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