POST UTME GREENFIELD UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant is placed in a controlled environment with a cons\tant temperature of 25°C and a relative humidity of 60%. After 24 hours, the plant's stomatal index is measured to be 0.5. What can be concluded about the plant's response to the environment?
A. The plant is experiencing drought stress.
B. The plant is experiencing heat stress.
C. The plant is experiencing water\logging.
D. The plant is experiencing normal growth conditions.
Question 2
In a typical e\cosystem, the producers are primarily responsible for which of the following?
A. Decomposition
B. Nutrient cycling
C. Primary production
D. Secondary production
Question 3
A study on the genetic basis of antibiotic resis\tance in bacteria revealed that the resis\tance gene is located on a plasmid. Which of the following is a likely consequence of this finding?
A. The bacteria will become more susceptible to antibiotics.
B. The bacteria will become more resis\tant to antibiotics.
C. The bacteria will not be affected by antibiotics.
D. The bacteria will develop new resis\tance mechanisms.
Question 4
What is the process by which plants convert light energy into chemical energy?
A. Respiration
B. Photosynthesis
C. Fermentation
D. Decomposition
Question 5
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores. Which of the following is a characteristic of these herbivores?
A. They have large body size
B. They have specialized digestive systems
C. They have adaptations for speed and agility
D. They have low metabolic rates
Question 6
What is the primary function of the mitochondria in eukaryotic cells?
A. Protein synthesis
B. Lipid synthesis
C. Carbohydrate synthesis
D. Energy production
Question 7
A diagram of a plant cell is shown below. Identify the organelle labeled 'X'.
A. Mitochondria
B. Chloroplast
C. Vacuole
D. Endoplasmic reticulum
Question 8
In a typical e\cosystem, what is the primary mechanism by which energy is transferred from one trophic level to the next?
A. Decomposition
B. Herbivory
C. Omnivory
D. Detritivory
Question 9
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 10
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 11
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the regulation of blood pressure?
A. The heart.
B. The arteries.
C. The capillaries.
D. The veins.
Question 12
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.
Question 13
A diagram of the water cycle is shown below. Which process is responsible for the evaporation of water from the surface of the ocean?
A. Evaporation
B. Condensation
C. Precipitation
D. Runoff
Question 14
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 15
A diagram of the human digestive system is shown below. Which part of the system is responsible for the breakdown of proteins into smaller peptides?
A. Stomach
B. Small intestine
C. Pancreas
D. Liver

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