POST UTME LEAD CITY UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A cell is placed in a solution with a concentration of 0.1 M glu\cose. If the cell has a permeability coefficient of 1.5 x 10^-6 cm/s and a surface area of 2.5 x 10^-4 cm^2, what is the rate of glu\cose diffusion into the cell?
A. 1.875 x 10^-8 mol/s
B. 3.75 x 10^-8 mol/s
C. 6.25 x 10^-8 mol/s
D. 9.375 x 10^-8 mol/s
Question 2
A diagram of a human eye is shown below. What is the function of the retina?
A. Detection of light and color
B. Detection of movement and depth
C. Detection of smell and taste
D. Detection of sound and touch
Question 3
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells, each with the same number and kind of chromosomes as the parent cell, is known as
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endosymbiosis
Question 4
A cell undergoing mitosis has a total of 46 chromosomes. If this cell is a somatic cell, what is the ploidy level of the organism it belongs to?
A. Diploid
B. Triploid
C. Tetraploid
D. Haploid
Question 5
A population of rabbits has a birth rate of 0.05 and a death rate of 0.01. If the population is initially 100, what is the population size after 5 years?
A. 120
B. 150
C. 180
D. 200
Question 6
A muscle cell is composed of several types of fibers, including skeletal muscle fibers and smooth muscle fibers. Which of the following characteristics is unique to skeletal muscle fibers?
A. Striated appearance
B. Smooth appearance
C. Multinucleated cells
D. Single nucleated cells
Question 7
The type of symbiotic relationship in which one organism benefits and the other is harmed is known as
A. Mutualism
B. Commensalism
C. Parasitism
D. Amensalism
Question 8
A plant has a root system with a total surface area of 10 cm^2. If the root system is exposed to a solution with a concentration of 0.5 M KCl, what is the rate of K+ uptake by the plant?
A. 5 x 10^-6 mol/s
B. 1 x 10^-5 mol/s
C. 1.5 x 10^-5 mol/s
D. 2 x 10^-5 mol/s
Question 9
A neuron has a resting membrane potential of -70 mV. If the neuron is stimulated with a 1 ms pulse of 10 mV, what is the resulting action potential?
A. -50 mV
B. -60 mV
C. -70 mV
D. -80 mV
Question 10
The process by which plants make their own food from sunlight, water, and carbon dioxide is known as
A. Photosynthesis
B. Respiration
C. Transpiration
D. Evaporation
Question 11
A genetic cross is performed between two true-breeding lines of Drosophila melanogaster. One line is homozygous dominant for the gene controlling eye color (B), and the other line is homozygous recessive (b). If the cross produces 100 offspring, and 60 have the dominant eye color, what is the genotype of the parents?
A. BB x bb
B. Bb x Bb
C. Bb x bb
D. bb x bb
Question 12
A diagram of a human brain is shown below. What is the function of the cerebellum?
A. Control of movement and balance
B. Control of emotions and motivation
C. Control of thought and memory
D. Control of hunger and thirst
Question 13
In a population of E. coli, the frequency of the gene for resis\tance to ampicillin is 0.2. If the population size is 10^6, how many bacteria are resis\tant to ampicillin?
A. 2000
B. 20000
C. 200000
D. 2000000
Question 14
The type of tissue that connects, supports, and binds other tissues and organs together is known as
A. Connective Tissue
B. Epithelial Tissue
C. Muscle Tissue
D. Nervous Tissue
Question 15
A hormone is released from the hypothalamus and binds to receptors in the pituitary gland. If the hormone has a dissociation cons\tant (Kd) of 10^-6 M and a concentration of 10^-5 M, what is the \fraction of receptors bound to the hormone?
A. 0.5
B. 0.6
C. 0.7
D. 0.8

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