POST UTME CRAWFORD UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of mitosis results in the production of two daughter cells that are genetically identical to the parent cell. What is the term for the process by which a cell divides into two daughter cells?
A. mitosis
B. meiosis
C. binary fission
D. \endosymbiosis
Question 2
A species of bird is found in a specific type of habitat. Which of the following is a possible explanation for the presence of this species in this habitat?
A. The species has adapted to the specific conditions of the habitat.
B. The species has migrated to the habitat from another location.
C. The species has been introduced to the habitat by humans.
D. The species has evolved to occupy the habitat.
Question 3
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. However, this principle assumes a population size of infinite size. What is the term for the change in allele frequency that occurs when the population size is finite?
A. mutation
B. genetic drift
C. natural selection
D. genetic variation
Question 4
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the stage of the cell cycle that this cell will enter next?
A. G1
B. S
C. G2
D. M
Question 5
A population of rabbits is introduced to a new island. The population grows rapidly at first, but eventually levels off. Which of the following is a possible explanation for this phenomenon?
A. The population is limited by the availability of food.
B. The population is limited by the availability of water.
C. The population is limited by the availability of space.
D. The population is limited by the availability of predators.
Question 6
A certain species of animal has a population growth rate of 20% per year. If the initial population is 1000 individuals, what will be the population size after 5 years?
A. 1000
B. 1200
C. 1500
D. 2000
Question 7
A bio\logist is studying the structure of the human body. Which of the following is a characteristic of the epithelial tissue?
A. Composed of muscle cells.
B. Composed of nerve cells.
C. Composed of epithelial cells.
D. Composed of connective tissue cells.
Question 8
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 frequency of the homozygous dominant genotype 'AA'?
A. 0.6
B. 0.4
C. 0.2
D. 0.8
Question 9
The process of asexual reproduction in plants involves the production of offspring without the involvement of gametes. Which of the following is an example of a type of asexual reproduction in plants?
A. Budding
B. Fragmentation
C. Runners
D. Rhizome
Question 10
In a human cell, the process of meiosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles
Question 11
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is a key intermediate in this process?
A. Pyruvate
B. Citrate
C. Oxaloacetate
D. Alpha-ketoglutarate
Question 12
A diagram of a food web is shown below. Which of the following is a characteristic of a producer in this e\cosystem?
A. Consumes other organisms for energy.
B. Produces its own food through photosynthesis.
C. Decomposes dead organisms for nutrients.
D. Stores energy in the form of fat.
Question 13
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is a byproduct of glycolysis?
A. pyruvate
B. ATP
C. NADH
D. FADH2
Question 14
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is a byproduct of the citric acid cycle?
A. NADH
B. FADH2
C. ATP
D. pyruvate
Question 15
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles

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