POST UTME LEAD CITY UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a plant cell is shown below. Identify the organelle responsible for protein synthesis.
A. Mitochondria
B. Chloroplast
C. Ribosome
D. Lysosome
Question 2
A 50-year-old woman has a family history of breast cancer. Her mother and sister both had breast cancer at the age of 40. What is the probability that she will develop breast cancer by the age of 50?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 3
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
A. It catalyzes the conversion of CO2 into a 3-carbon molecule.
B. It is responsible for the light-dep\endent reactions.
C. It is involved in the Hill reaction.
D. It is a key enzyme in the C4 pathway.
Question 4
What is the primary mechanism by which the liver regulates blood glu\cose levels in a person with diabetes?
A. By increa\sing the production of insulin
B. By increa\sing the production of glucagon
C. By increa\sing the breakdown of glycogen
D. By increa\sing the production of glu\cose
Question 5
In the context of classification of living things, what is the primary difference between a kingdom and a phylum?
A. A kingdom is a higher taxonomic rank than a phylum
B. A phylum is a higher taxonomic rank than a kingdom
C. A kingdom is a group of related organisms, while a phylum is a group of related species
D. A phylum is a group of related organisms, while a kingdom is a group of related species
Question 6
In a plant, what is the primary function of the xylem in transporting water and minerals from the roots to the leaves?
A. To transport water and minerals through the phloem
B. To transport water and minerals through the xylem
C. To transport sugars and amino acids through the phloem
D. To transport water and minerals through the roots
Question 7
A 40-year-old male patient presents with a 10-year history of progressive weakness and fatigue. His hemoglobin level is 10.5 g/dL, and his mean corpuscular volume (MCV) is 100 fL. Which of the following is the most likely diagnosis?
A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Thalassemia major
Question 8
A cell divides by mitosis to produce two daughter cells. If the original cell has 16 chromosomes, how many chromosomes will each daughter cell have?
A. 8
B. 16
C. 32
D. 64
Question 9
In the context of cell division, what is the primary function of the spindle fibers?
A. To separate chromosomes during mitosis
B. To separate chromosomes during meiosis
C. To regulate cell growth and differentiation
D. To regulate cell death and apoptosis
Question 10
A 25-year-old male patient presents with a 2-year history of progressive weakness and fatigue. His hemoglobin level is 8.5 g/dL, and his mean corpuscular volume (MCV) is 80 fL. Which of the following is the most likely diagnosis?
A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Thalassemia major
Question 11
A 2.5 L flask contains 0.5 M HCl. If 1.5 L of the solution is removed and replaced with 1.5 L of 0.5 M NaOH, what is the new concentration of HCl in the flask?
A. 0.25 M
B. 0.5 M
C. 0.75 M
D. 1.0 M
Question 12
In a person with a head injury, what is the primary function of the cerebellum in regulating balance and coordination?
A. To regulate balance and coordination by integrating sensory information
B. To regulate balance and coordination by producing motor responses
C. To regulate balance and coordination by controlling eye movements
D. To regulate balance and coordination by controlling posture
Question 13
A patient with a severe case of cholera has a high concentration of Vibrio cholerae bacteria in their stool. What is the primary mechanism by which these bacteria cause the disease?
A. The bacteria produce a toxin that inhibits the absorption of water and ions in the small intestine
B. The bacteria produce a toxin that stimulates the release of histamine, leading to increased gut motility
C. The bacteria produce a toxin that damages the epithelial cells of the small intestine
D. The bacteria produce a toxin that stimulates the release of gastrin, leading to increased acid production
Question 14
What is the primary difference between the xylem and phloem in plants?
A. Xylem transports water and minerals, while phloem transports sugars and amino acids
B. Xylem transports sugars and amino acids, while phloem transports water and minerals
C. Xylem is responsible for photosynthesis, while phloem is responsible for respiration
D. Xylem is responsible for respiration, while phloem is responsible for photosynthesis
Question 15
In the context of asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Genetic recombination
C. Gene duplication
D. Gene deletion

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