POST UTME GREENFIELD UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of genetic drift can lead to the loss of genetic variation in a population. Which of the following is a factor that can contribute to genetic drift?
A. Mutation
B. Gene flow
C. Genetic drift
D. Genetic variation
Question 2
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. The trachea.
B. The diaphragm.
C. The lungs.
D. The bronchi.
Question 3
In a eukaryotic cell, the \endoplasmic reticulum is involved in the synthesis of proteins that are destined for secretion or for use within the cell. Which of the following statements is correct regarding the \endoplasmic reticulum?
A. It is a type of lysosome.
B. It is a type of mitochondrion.
C. It is involved in the synthesis of proteins that are destined for use within the cell.
D. It is involved in the synthesis of proteins that are destined for secretion.
Question 4
In a typical cell, the mitochondria is responsible for producing energy for the cell through which process?
A. Photosynthesis
B. Respiration
C. Fermentation
D. Glycolysis
Question 5
A researcher isolates a bacterium that exhibits antibiotic resis\tance. The bacterium's DNA is analyzed, and a point mutation is found in the gene encoding the target protein of the antibiotic. What type of mutation is this?
A. Frameshift mutation
B. Point mutation
C. Deletion
D. Insertion
Question 6
A population of rabbits in a forest e\cosystem is growing at a rate of 20% per year. If the initial population size is 100 rabbits, what will be the population size after 5 years?
A. 1000
B. 2000
C. 4000
D. 8000
Question 7
What is the process by which plants convert light energy into chemical energy?
A. Respiration
B. Photosynthesis
C. Fermentation
D. Decomposition
Question 8
What is the term for the process by which an organism's genetic information is altered by external factors?
A. Mutation
B. Genetic drift
C. Gene flow
D. Epigenetics
Question 9
A researcher studying the classification of living things identifies a new species of plant that exhibits characteristics of both monocots and dicots. Which of the following is a possible explanation for this observation?
A. The plant has undergone a process of hybridization with another species.
B. The plant has evolved to occupy a unique eco\logical niche.
C. The plant has a mixed ploidy level, resulting in a combination of monocot and dicot traits.
D. The plant has a developmental anomaly that affects its morpho\logy.
Question 10
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell?
A. The cell will shrink due to water loss.
B. The cell will swell due to water uptake.
C. The cell will remain unchanged.
D. The cell will burst due to osmotic pressure.
Question 11
In a eukaryotic cell, what is the primary function of the \endoplasmic reticulum?
A. Protein synthesis
B. Lipid synthesis
C. Carbohydrate synthesis
D. Cell signaling
Question 12
In a tropical rainforest, the xylem tissue in the vascular bundle of a plant is responsible for transporting water and minerals from the roots to the leaves. What is the primary mechanism by which xylem tissue achieves this transport?
A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis
Question 13
A person is unable to see objects clearly at a dis\tance. Which of the following is a possible explanation for this observation?
A. The person has a re\fractive error in their cornea.
B. The person has a problem with their retina.
C. The person has a muscle imbalance in their eye.
D. The person has a problem with their optic nerve.
Question 14
A cell is placed in a hypotonic solution, cau\sing it to swell. Which of the following is a consequence of this process?
A. The cell membrane becomes more permeable to water.
B. The cell undergoes a process of apoptosis.
C. The cell experiences a decrease in turgor pressure.
D. The cell's cytoplasm becomes more viscous.
Question 15
A study on the genetic basis of height in humans revealed that the height gene is located on chromosome 4. Which of the following is a likely consequence of this finding?
A. The height gene will be inherited in an autosomal dominant pattern.
B. The height gene will be inherited in an autosomal recessive pattern.
C. The height gene will be inherited in an X-linked dominant pattern.
D. The height gene will be inherited in an X-linked recessive pattern.

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