POST UTME CHRISTOPHER UNIVERSITY 2023 Biology | Objective
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Question 1
The bacterium Escherichia coli (E. coli) is a common inhabi\tant of the human gut. It plays a crucial role in the breakdown of complex carbohydrates. Which of the following enzymes is primarily responsible for the breakdown of starch in E. coli?
Question 2
The human eye is a complex sensory organ that allows us to perceive light and color. Which of the following structures is responsible for the accommodation of light in the human eye?
Question 3
A 2-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the mutated gene. What is the probability that their next child will be affected by the disorder?
Question 4
A 5-year-old child is diagnosed with a rare genetic disorder that affects the production of a specific enzyme. The child's parents are both carriers of the mutated gene. What is the probability that their next child will be affected by the disorder?
Question 5
A diagram of a plant cell is shown below. Identify the organelle labeled 'X'.
Question 6
The theory of evolution by natural selection was first proposed by Charles Darwin in his book 'On the Origin of Species'. Which of the following is a key mechanism of evolution that leads to the adaptation of organisms to their environment?
Question 7
A researcher is studying the effect of a new medication on blood pressure in a group of patients. The data shows a significant decrease in blood pressure after treatment. However, the researcher notices that the data points are not normally distributed. What statistical test would be most appropriate to use?
Question 8
The classification of living organisms into kingdoms is based on their cell structure and mode of nutrition. Which of the following kingdoms includes organisms that are unicellular, eukaryotic, and have a cell wall made of cellulose?
Question 9
The sense organ responsible for detecting changes in light intensity is the
Question 10
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
Question 11
The process of meiosis in a eukaryotic cell results in the production of four haploid daughter cells, each with half the number of chromosomes as the parent cell. Which of the following statements is true regarding the genetic variation introduced by meiosis?
Question 12
The xylem in plants is responsible for transporting
Question 13
A researcher is studying the population dynamics of a rabbit population in a controlled environment. The population grows according to the \logistic growth equation: dP/dt = rP\( 1 - P/K \). What is the carrying capacity (K) of the population?
Question 14
A 2.5 L container holds 2.0 mol of an ideal gas at 298 K. What is the pressure of the gas?
Question 15
In a population of 1000 individuals, the frequency of the dominant allele (A) is 0.6, and the frequency of the recessive allele (a) is 0.4. What is the expected genotype and phenotype distribution in the F1 generation?
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