POST UTME LEAD CITY UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a photosynthetic pathway, which of the following pigments is primarily responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
D. Phycobiliproteins
Question 2
A plant grows in a pot with a mixture of 50% sand and 50% clay. If the plant requires 20% more water than the sand alone, what is the percentage of clay in the mixture?
A. 20%
B. 30%
C. 40%
D. 50%
Question 3
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 4
A DNA molecule consists of two complementary strands of nucleotides. If the sequence of one strand is ATCG, what will be the sequence of the complementary strand?
A. TAGC
B. ATGC
C. TACG
D. GATC
Question 5
A plant is placed in a solution of 0.1 M glu\cose. If the plant absorbs 20 mL of the solution, what is the concentration of glu\cose in the plant's xylem?
A. 0.001 M
B. 0.002 M
C. 0.003 M
D. 0.004 M
Question 6
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 7
A bacterium is placed in a medium with a pH of 7.0. If the bacterium has a pH optimum of 6.5, what is the likely outcome?
A. The bacterium will grow rapidly
B. The bacterium will grow slowly
C. The bacterium will not grow
D. The bacterium will die
Question 8
A population of rabbits is growing exponentially. If the initial population is 100 and the growth rate is 20% per year, what will be the population after 5 years?
A. 1000
B. 2000
C. 4000
D. 8000
Question 9
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 10
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 11
A kidney stone is composed of calcium oxalate crystals. If the stone has a volume of 1 cm^3, and the density of the stone is 2.5 g cm^-3, what is the mass of the stone?
A. 2.5 g
B. 5 g
C. 10 g
D. 20 g
Question 12
The process by which an organism's genetic information is passed from one generation to the next is known as
A. Heritability
B. Inheri\tance
C. Mutation
D. Genetic Drift
Question 13
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Regulation of hunger and thirst
C. Regulation of hormone secretion
D. Regulation of sleep-wake cycle
Question 14
A species of yeast undergoes asexual reproduction by budding. If the initial population size is 1000 cells, and the population doubles every 2 hours, how many cells will be present after 6 hours?
A. 16000
B. 32000
C. 64000
D. 128000
Question 15
A researcher is studying the effect of pH on the activity of a certain enzyme. If the enzyme is most active at a pH of 7.5 and the researcher wants to determine the pH at which the enzyme is 50% active, what would be the pH value?
A. 6.5
B. 7
C. 7.5
D. 8

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