POST UTME ESUT 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. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 2
A gene has two alleles, 'A' and 'a', with frequencies 0.6 and 0.4, respectively. What is the probability that an individual is homozygous recessive?
A. 0.16
B. 0.24
C. 0.36
D. 0.48
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 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 5
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a photoperiod of 12 hours light and 12 hours darkness. If the plant is in the vegetative stage, what is the expected effect on the plant's growth rate if the temperature is increased to 30°C?
A. Increased growth rate
B. Decreased growth rate
C. No change in growth rate
D. Variable growth rate
Question 6
A 10 mL sample of a solution containing 0.5 M glu\cose is diluted to 50 mL. What is the concentration of the resulting solution?
A. 0.1 M
B. 0.2 M
C. 0.5 M
D. 1 M
Question 7
In the context of osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate the concentration of ions in the blood
B. To remove excess water from the body
C. To maintain acid-base balance
D. To regulate blood pressure
Question 8
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 9
The reproductive system of a plant consists of the male and female reproductive organs. Which of the following is a characteristic of the female reproductive organ?
A. It produces pollen
B. It produces ovules
C. It produces nectar
D. It produces seeds
Question 10
In the context of eco\logical succession, what is the term for the initial stage of a new e\cosystem?
A. Pioneer stage
B. Climax stage
C. Intermediate stage
D. Succession stage
Question 11
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 12
A 2.0 L solution contains 0.1 M glu\cose. If 10 mL of this solution is diluted to 100 mL, what is the concentration of glu\cose in the final solution?
A. 0.01 M
B. 0.02 M
C. 0.05 M
D. 0.1 M
Question 13
The process by which an organism produces offspring without the involvement of gametes is known as _______.
A. Asexual Reproduction
B. Sexual Reproduction
C. Binary Fission
D. Endoreduplication
Question 14
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 15
A bio\logist is studying the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
B. Chloroplast
C. Endoplasmic reticulum
D. Lysosome

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