POST UTME ESUT 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a simple circuit is shown below. What is the total resis\tance of the circuit?
A. R1 + R2
B. R1 - R2
C. R1 x R2
D. R1 / R2
Question 2
A plant cell has a cell wall composed of cellulose, hemicellulose, and pectin. Which of the following is NOT a function of the cell wall?
A. Support and protection
B. Storage of nutrients
C. Regulation of cell growth
D. Transport of subs\tances
Question 3
The theory of evolution by natural selection was first proposed by what scientist?
A. Charles Darwin
B. Gregor M\endel
C. Jean-Baptiste Lamarck
D. Alfred Russel Wallace
Question 4
A neuron has a resting potential of -70 mV. If it is depolarized by 20 mV, what is the new membrane potential?
A. -50 mV
B. -60 mV
C. -80 mV
D. -90 mV
Question 5
A geneticist is studying the inheri\tance of a particular trait in a population. Which of the following types of genetic variation would be most likely to result in a change in the frequency of the trait?
A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection
Question 6
A diagram of a photosynthesis reaction is shown below. What is the role of the enzyme RuBisCO in the reaction?
A. To fix CO2 into a 3-carbon molecule
B. To convert RuBP into a 3-carbon molecule
C. To convert a 3-carbon molecule into RuBP
D. To convert CO2 into a 3-carbon molecule
Question 7
A neuron has a resting potential of -70 mV. If it is depolarized by 20 mV, what is the new membrane potential?
A. -50 mV
B. -60 mV
C. -80 mV
D. -90 mV
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. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 9
The xylem tissue in plants is responsible for transporting what type of subs\tance?
A. Water and minerals
B. Sugars and amino acids
C. Oxygen and carbon dioxide
D. Hormones and nutrients
Question 10
The process of diffusion in a cell membrane is facilitated by the presence of what type of proteins?
A. Carrier proteins
B. Channel proteins
C. Transport proteins
D. Enzyme proteins
Question 11
A 2.5 g sample of a compound containing only carbon and hydrogen is burned in oxygen to produce 3.5 L of carbon dioxide and 1.5 L of water vapor at 25°C and 1 atm. What is the empirical formula of the compound?
A. CH2
B. C2H4
C. C3H6
D. C4H8
Question 12
In the context of the classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their physical characteristics
B. To group organisms based on their genetic makeup
C. To group organisms based on their metabolic processes
D. To group organisms based on their eco\logical niches
Question 13
A plant has a mutation that causes its leaves to be green. If the plant is crossed with a plant that has yellow leaves, what is the probability that the offspring will have green leaves?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 14
The xylem and phloem are two types of vascular tissues found in plants. Which of the following is a primary function of the xylem?
A. To transport water and minerals from the roots to the leaves
B. To transport sugars and other organic compounds from the leaves to the rest of the plant
C. To provide structural support to the plant
D. To regulate the plant's water balance
Question 15
A diagram of a mitotic spindle is shown below. What is the function of the microtubules in the spindle?
A. To separate chromosomes during anaphase
B. To form the nuclear envelope during telophase
C. To condense chromosomes during prophase
D. To form the spindle fibers during metaphase

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