POST UTME BELLS UNIVERSITY 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the Hardy-Weinberg principle is applied, what is the frequency of the homozygous dominant genotype?
A. 0.36
B. 0.64
C. 0.16
D. 0.44
Question 2
A plant has a root system that consists of a taproot and a network of smaller roots. What is the primary function of the taproot?
A. To absorb water and nutrients
B. To store food and water
C. To anchor the plant
D. To produce hormones
Question 3
In the context of cell division, what is the primary function of the mitotic spindle?
A. To separate chromosomes
B. To regulate gene expression
C. To maintain cell shape
D. To transport molecules
Question 4
The part of the plant that absorbs water and minerals from the soil is called
A. Root
B. Stem
C. Leaf
D. Flower
Question 5
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 expected frequency of the homozygous dominant genotype 'AA'?
A. 0.48
B. 0.52
C. 0.56
D. 0.64
Question 6
The hormone responsible for regulating the growth and development of plants is
A. Gibberellin
B. Auxin
C. Cytokinin
D. Ethylene
Question 7
In a photosynthetic plant, the light-dep\endent reactions occur in the thylakoid membranes of the chloroplasts. Which of the following is a product of the light-dep\endent reactions?
A. ATP
B. NADPH
C. RuBP
D. O2
Question 8
A population of rabbits is introduced to an island with limited resources. Which of the following best describes the expected outcome?
A. The population will increase exponentially
B. The population will stabilize at a carrying capacity
C. The population will decline due to resource limitation
D. The population will remain unchanged
Question 9
A diagram of the respiratory system is shown below:
A. The trachea is responsible for gas exchange
B. The lungs are responsible for gas exchange
C. Both the trachea and lungs are responsible for gas exchange
D. Neither the trachea nor the lungs are responsible for gas exchange
Question 10
A patient has been diagnosed with a bacterial infection. The bacteria are resis\tant to multiple antibiotics. Which of the following is the most likely cause of this resis\tance?
A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation
D. Gene editing
Question 11
In the context of sexual reproduction, what is the primary function of the sperm cell?
A. To provide genetic material
B. To fertilize the egg cell
C. To regulate hormone levels
D. To maintain blood pressure
Question 12
In the context of evolutionary theory, what is the primary mechanism driving the adaptation of species to their environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 13
In a study on the effect of pH on enzyme activity, the following data were collected:
A. pH 7
B. pH 9
C. pH 11
D. pH 13
Question 14
The growth of a population is influenced by several factors, including birth rate, death rate, and immigration/emigration. Which of the following is a characteristic of a population with a high birth rate?
A. High population density
B. Low population density
C. High birth rate
D. Low birth rate
Question 15
The part of the plant that makes food from sunlight is called
A. Root
B. Stem
C. Leaf
D. Flower

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