POST UTME LEAD CITY UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 0.8
D. 0.16
Question 2
In the context of cellular respiration, what is the role of the mitochondria?
A. Site of protein synthesis
B. Site of cellular respiration
C. Site of cell division
D. Site of cell signaling
Question 3
The sense organ responsible for detecting sound waves is the ear. Which of the following is a part of the ear?
A. Cochlea
B. Vestibule
C. Eustachian tube
D. Tympanic membrane
Question 4
The process by which plants convert light energy into chemical energy is known as?
A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis
Question 5
A 5-kg block is attached to a horizontal spring with a force cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is its maximum kinetic energy?
A. 0.4
B. 0.6
C. 0.8
D. 1.0
Question 6
A 0.5 L solution contains 0.2 mol of glu\cose. What is the concentration of glu\cose?
A. 0.2 M
B. 0.3 M
C. 0.4 M
D. 0.5 M
Question 7
The sense organ responsible for detecting changes in light intensity is the?
A. Eye
B. Ear
C. Nose
D. Mouth
Question 8
The process of mitosis is a type of cell division that results in two daughter cells with the same number of chromosomes as the parent cell. Which of the following stages of mitosis is characterized by the separation of sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 9
The transport of subs\tances across cell membranes is an impor\tant function of cells. Which of the following is a type of transport?
A. Passive transport
B. Active transport
C. Osmosis
D. Diffusion
Question 10
The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for protein synthesis?
A. Mitochondrion
B. Plastid
C. Ribosome
D. Nucleus
Question 11
A 2.5-liter solution contains 1.8 liters of ethanol and 0.7 liters of water. What is the mole \fraction of ethanol?
A. 0.64
B. 0.72
C. 0.80
D. 0.88
Question 12
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
A. It catalyzes the conversion of CO2 to a 3-carbon molecule
B. It is involved in the light-dep\endent reactions
C. It is a key enzyme in the breakdown of starch
D. It is responsible for the synthesis of ATP
Question 13
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 20% per hour, what will be the population size after 3 hours?
A. 1600
B. 2000
C. 2500
D. 3000
Question 14
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' for red eyes is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 15
The process of hormonal coordination involves the release of hormones from the hypothalamus, which then stimulate the release of other hormones from the pituitary gland. What is the primary function of the hypothalamus in this process?
A. To regulate body temperature
B. To stimulate the release of other hormones
C. To control appetite and thirst
D. To regulate sleep and wakefulness

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