POST UTME CHRISTOPHER UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the term for the process by which an organism's genetic information is influenced by environmental factors?
A. Gene expression
B. Gene regulation
C. Epigenetics
D. Genetic engineering
Question 2
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Gene flow
C. Genetic drift
D. Genetic recombination
Question 3
A diagram shows a simple harmonic motion graph with a period of 2 seconds. What is the frequency of the motion?
A. 1 Hz
B. 2 Hz
C. 3 Hz
D. 4 Hz
Question 4
A plant grows from a seed in a controlled environment. The plant's growth rate is measured over time and is found to be proportional to the square root of the time elapsed. If the plant's growth rate is 2 cm/h at t = 4 hours, what is the growth rate at t = 16 hours?
A. 1
B. 2
C. 4
D. 8
Question 5
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. To transport water and minerals
B. To store food and water
C. To provide structural support
D. To regulate water potential
Question 6
A diagram of a plant cell is shown below. What is the function of the cell wall?
A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To produce energy for the cell
D. To synthesize proteins
Question 7
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 true about the \endoplasmic reticulum?
A. It is a type of lysosome.
B. It is a type of mitochondrion.
C. It is a type of ribosome.
D. It is involved in the synthesis of proteins that are destined for secretion or for use within the cell.
Question 8
In the context of eco\logy, what is the primary difference between a biome and a habitat?
A. A biome is a larger geographic area, while a habitat is a specific location within a biome.
B. A biome is a specific location, while a habitat is a larger geographic area.
C. A biome is a type of e\cosystem, while a habitat is a specific environment within an e\cosystem.
D. A biome is a specific environment, while a habitat is a type of e\cosystem.
Question 9
In the cell cycle, what is the primary function of the G1 phase?
A. To synthesize DNA
B. To replicate DNA
C. To prepare for cell division
D. To repair DNA damage
Question 10
The process of exocytosis is a type of active transport that occurs in cells. Which of the following statements is true about exocytosis?
A. It is a type of passive transport.
B. It is a type of active transport.
C. It occurs in the presence of a concentration gradient.
D. It occurs in the absence of a concentration gradient.
Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype?
A. 0.04
B. 0.16
C. 0.24
D. 0.36
Question 12
The process of mitosis is a type of cell division that results in the production of two daughter cells that are genetically identical to the parent cell. Which of the following statements is true about mitosis?
A. It is a type of asexual reproduction.
B. It is a type of sexual reproduction.
C. It results in the production of two daughter cells that are genetically identical to the parent cell.
D. It results in the production of two daughter cells that are genetically different from the parent cell.
Question 13
The process of osmosis is a type of passive transport that occurs in cells. Which of the following statements is true about osmosis?
A. It is a type of active transport.
B. It is a type of passive transport.
C. It occurs in the presence of a concentration gradient.
D. It occurs in the absence of a concentration gradient.
Question 14
In the context of osmoregulation, what is the primary function of the hypothalamus in regulating water balance in the body?
A. To maintain a stable blood pressure
B. To regulate the amount of water in the body
C. To control the concentration of electrolytes in the blood
D. To stimulate the release of antidiuretic hormone (ADH)
Question 15
In the tissue system, what is the primary function of the vascular tissue?
A. To provide structural support
B. To store food and water
C. To transport water and minerals
D. To regulate water potential

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