POST UTME ELIZADE UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. No natural selection
Question 2
A researcher is studying the effect of pH on the growth of Escherichia coli. The researcher sets up three identical experiments with different pH levels: 5, 7, and 9. Which pH level is most likely to inhibit the growth of E. coli?
A. pH 5
B. pH 7
C. pH 9
D. pH 10
Question 3
A 2-year-old child is diagnosed with a rare genetic disorder that affects the production of melanin. The child's skin appears pale, and the hair is light brown. What is the most likely cause of this condition?
A. Albinism
B. Vitiligo
C. Porphyria
D. Leukoderma
Question 4
In a population of 1000 individuals, 200 have the genotype TT, 600 have the genotype Tt, and 200 have the genotype tt. What is the frequency of the recessive allele 't'?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 5
What is the term for the movement of water from the roots to the leaves through the xylem?
A. Transpiration
B. Osmosis
C. Diffusion
D. Translocation
Question 6
The diagram below shows a cross-section of a human eye. Which of the following structures is responsible for the accommodation of light?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 7
In a population of 1000 individuals, 70% have the dominant allele for brown eye color (B) and 30% have the recessive allele for blue eye color (b). What is the frequency of the B allele?
A. 0.7
B. 0.3
C. 0.4
D. 0.6
Question 8
The following table shows the results of a survey on the prevalence of different diseases in a population. Which of the following is a correct interpretation of the data?
A. Disease A is more prevalent than Disease B
B. Disease B is more prevalent than Disease A
C. The prevalence of Disease A and Disease B is equal
D. The data is insufficient to determine the prevalence of Disease A and Disease B
Question 9
The human eye is a complex sensory organ that allows us to perceive light and color. Which of the following structures is responsible for detecting light intensity?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 10
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if five conditions are met. Which of the following is NOT one of these conditions?
A. large population size
B. no mutation
C. no gene flow
D. random mating
Question 11
The classification of living organisms into kingdoms is based on several characteristics. Which of the following is a key characteristic used to distinguish between the kingdoms Protista and Fungi?
A. Cell wall composition
B. Mode of nutrition
C. Reproduction method
D. Cell shape
Question 12
The following table shows the results of a survey on the prevalence of different diseases in a population. Which of the following is a correct interpretation of the data?
A. Disease B is more prevalent than Disease A
B. Disease A is more prevalent than Disease B
C. The prevalence of Disease A and Disease B is equal
D. The data is insufficient to determine the prevalence of Disease A and Disease B
Question 13
A researcher is studying the effect of temperature on the rate of photosynthesis in plants. The researcher sets up three identical experiments with different temperatures: 20°C, 30°C, and 40°C. Which temperature is most likely to increase the rate of photosynthesis?
A. 20°C
B. 30°C
C. 40°C
D. 50°C
Question 14
The process of osmoregulation in animals involves the regulation of water and ion balance. Which of the following is a key mechanism used by the kidneys to regulate water balance?
A. Reabsorption of glu\cose and amino acids
B. Excretion of excess ions
C. Production of antidiuretic hormone (ADH)
D. Regulation of blood pressure
Question 15
A diagram of a plant cell is shown below. Identify the organelle labeled 'X'.
A. Mitochondria
B. Chloroplast
C. Vacuole
D. Endoplasmic Reticulum

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