POST UTME UNN 2024 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
The process of digestion in the human body involves the breakdown of complex molecules into simpler ones. Which of the following enzymes is responsible for breaking down proteins?
Question 2
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'?
Question 3
A diagram shows a cross-section of a plant root. Which of the following structures is responsible for the absorption of water and minerals from the soil?
Question 4
In a tropical rainforest e\cosystem, the primary producers are plants that undergo photosynthesis. What is the net result of photosynthesis in terms of oxygen and glu\cose production?
Question 5
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
Question 6
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 4, what is the new photosynthetic rate?
Question 7
The diagram below represents a cross-section of the human eye. Identify the structure labeled 'A' that is responsible for detecting light and color.
Question 8
A diagram shows a simple circuit with a battery, a resistor, and a light bulb. If the battery has a voltage of 9V and the resistor has a resis\tance of 10Ω, what is the current flowing through the circuit?
Question 9
A population of bacteria is growing exponentially according to the equation ( N(t) = N_0 e^{kt} ), where \( N_0 \) is the initial population, ( k ) is the growth rate, and ( t ) is time in hours. If the population doubles every 2 hours, what is the value of ( k )?
Question 10
A researcher is studying the effect of pH on the growth of a microorganism. The growth rate is measured in units of cell divisions per hour. If the growth rate at pH 5 is 0.2 cell divisions per hour, and the growth rate at pH 7 is 1.5 cell divisions per hour, what is the pH at which the growth rate is 0.8 cell divisions per hour?
Question 11
In a population of 1000 individuals, 20% are homozygous dominant (BB), 40% are heterozygous (Bb), and 40% are homozygous recessive (bb). What is the frequency of the recessive allele (b)?
Question 12
A diagram of a plant's vascular system is shown below. What is the function of the xylem vessels?
Question 13
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 will be greater than 175 cm?
Question 14
A plant has a stomatal density of 100 stomata cm-2. If the stomatal index is 0.5, what is the total leaf area?
Question 15
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is NOT a byproduct of photosynthesis?
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