POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process by which microorganisms such as bacteria and viruses cause disease in humans is known as _______.
A. infection
B. contamination
C. toxicity
D. allergenicity
Question 2
The diagram below shows the structure of a plant cell. Identify the part labeled _______.
A. plasma membrane
B. nucleus
C. mitochondria
D. vacuole
Question 3
A diagram of a plant's xylem is shown below. Which of the following is a characteristic of the xylem tissue?
A. It is composed of tracheids and xylem vessels
B. It is composed of xylem parenchyma and xylem fibers
C. It is composed of phloem and xylem
D. It is composed of only tracheids
Question 4
A 5-year-old child is diagnosed with acute lymphoblastic leukemia (ALL). The child's white blood cell count is 100,000/μL. What is the likely stage of the disease?
A. Stage I
B. Stage II
C. Stage III
D. Stage IV
Question 5
A 2.5 L flask contains a mixture of O2 and N2 at 25°C and 1 atm. If 1.5 L of the mixture is removed and replaced with O2 at the same temperature and pressure, what is the final partial pressure of O2?
A. 0.75 atm
B. 0.85 atm
C. 0.95 atm
D. 1.05 atm
Question 6
In the process of respiration, what is the byproduct of the breakdown of glu\cose in the presence of oxygen?
A. Carbon dioxide and water
B. Glu\cose and oxygen
C. Carbon dioxide and oxygen
D. Water and oxygen
Question 7
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a random sample of 50 individuals is taken from this population, what is the probability that the sample mean height is less than 165 cm?
A. 0.0056
B. 0.0102
C. 0.0148
D. 0.0194
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. 0.36
B. 0.64
C. 0.72
D. 0.88
Question 9
The human eye contains a lens that changes shape to focus on objects at different dis\tances. This is an example of a(n) _______ adaptation.
A. convergent
B. divergent
C. accommodative
D. re\fractive
Question 10
A plant grows in a controlled environment with a cons\tant temperature and light intensity. What is the primary factor limiting its growth?
A. Water availability
B. Nutrient availability
C. Temperature
D. Light intensity
Question 11
What is the primary function of the mitochondria in a cell?
A. To synthesize proteins
B. To store genetic information
C. To generate energy for the cell
D. To regulate cell growth
Question 12
What is the term for the process by which plants convert light energy into chemical energy?
A. Photosynthesis
B. Respiration
C. Decomposition
D. Fermentation
Question 13
A geneticist observes that a particular trait in a population is influenced by multiple genes. What type of inheri\tance pattern is this an example of?
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. Polygenic inheri\tance
Question 14
A researcher isolates a new species of bacteria that exhibits a unique type of photosynthesis. The bacteria have a photosynthetic pigment that absorbs light in the blue-violet region of the visible spectrum. What is the likely wavelength of light that this pigment absorbs?
A. 400-500 nm
B. 500-600 nm
C. 600-700 nm
D. 700-800 nm
Question 15
A researcher discovers a microorganism that exhibits a unique metabolic pathway. What is the most likely reason for this discovery?
A. Evolutionary adaptation
B. Genetic mutation
C. Environmental influence
D. Random chance

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