POST UTME BABCOCK UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A researcher is studying the effect of pH on the growth of a microorganism. Which of the following would be the most appropriate method for measuring the pH of the growth medium?
A. U\sing a pH meter
B. U\sing a pH indicator
C. U\sing a spectrophotometer
D. U\sing a microscope
Question 2
A patient is experiencing difficulty regulating their body temperature. Which of the following systems is responsible for thermoregulation?
A. Nervous system
B. Endocrine system
C. Circulatory system
D. Integumentary system
Question 3
A diagram of a plant's root system is shown below. What is the name of the part labeled 'A'?
A. Taproot
B. Fibrous root
C. Adventitious root
D. Lateral root
Question 4
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation in the absence of certain factors. Which of the following is a correct description of the Hardy-Weinberg principle?
A. The frequency of alleles in a population will change over time due to genetic drift.
B. The frequency of alleles in a population will remain cons\tant from generation to generation in the absence of certain factors.
C. The frequency of alleles in a population will increase over time due to natural selection.
D. The frequency of alleles in a population will decrease over time due to mutation.
Question 5
A researcher is studying the effect of a certain subs\tance on the growth of a plant. Which of the following would be the most appropriate method for measuring the growth of the plant?
A. U\sing a spectrophotometer
B. U\sing a pH meter
C. U\sing a microscope
D. Measuring the length of the plant with a ruler
Question 6
A study on the genetic variation of a population found that the frequency of the dominant allele (A) is 0.6, while the frequency of the recessive allele (a) is 0.4. What is the expected frequency of the genotype AA in the next generation?
A. 0.36
B. 0.48
C. 0.64
D. 0.72
Question 7
A cell is placed in a solution with a high concentration of a certain subs\tance. What would be the most likely effect on the cell?
A. The cell would swell and eventually burst
B. The cell would shrink and eventually die
C. The cell would remain unchanged
D. The cell would grow and divide
Question 8
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation in the absence of certain factors. Which of the following is NOT one of the factors that can cause a change in allele frequency?
A. Mutation
B. Genetic drift
C. Gene flow
D. Natural selection
Question 9
A 2.0 L flask contains 0.050 M NaOH. If 25 mL of 0.10 M HCl is added to the flask, what is the resulting concentration of NaOH?
A. 0.045 M
B. 0.050 M
C. 0.055 M
D. 0.060 M
Question 10
A patient is diagnosed with a genetic disorder that affects the production of a specific enzyme. Which of the following types of genetic variation is most likely responsible for this disorder?
A. Point mutation
B. Frameshift mutation
C. Deletion
D. Insertion
Question 11
A plant with a mutation in the chloroplast DNA has a reduced ability to undergo photosynthesis. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 12
In a tropical rainforest e\cosystem, what is the primary role of the decomposer community?
A. To produce organic compounds through photosynthesis
B. To break down dead plant and animal matter into simpler subs\tances
C. To form symbiotic relationships with other organisms
D. To regulate the water cycle
Question 13
In a typical terrestrial e\cosystem, what is the primary function of the root system in relation to the shoot system?
A. To absorb water and nutrients from the soil
B. To produce food through photosynthesis
C. To store water and nutrients for the plant
D. To regulate the plant's temperature
Question 14
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Mitochondria
C. Ribosome
D. Lysosome
Question 15
A geneticist wants to study the inheri\tance of a specific trait in a population of pea plants. Which type of genetic cross would be most appropriate?
A. Monohybrid cross
B. Dihybrid cross
C. Test cross
D. Backcross

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