POST UTME RSU 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 10-kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. What is the maximum kinetic energy of the block?
A. 2 J
B. 5 J
C. 10 J
D. 20 J
Question 2
A 5.0 g sample of a mixture of NaCl and KCl is analyzed by flame photometry. If the amount of sodium detected is 2.5 g and the amount of potassium detected is 1.0 g, what is the percentage composition of the mixture?
A. NaCl: 60%, KCl: 40%
B. NaCl: 40%, KCl: 60%
C. NaCl: 50%, KCl: 50%
D. NaCl: 30%, KCl: 70%
Question 3
The process of excretion in humans involves the removal of waste products from the body through the
A. Skin
B. Lungs
C. Liver
D. Kidneys
Question 4
A patient is experiencing symptoms of a neuro\logical disorder. The patient's brain scan shows a characteristic 'ring of fire' appearance. What is the most likely diagnosis?
A. Multiple sclerosis
B. Amyotrophic lateral sclerosis
C. Parkinson's disease
D. Huntington's disease
Question 5
A 50-gram sample of a subs\tance is dissolved in 100 milliliters of water. If the solution has a pH of 4.5, what is the concentration of hydrogen ions in the solution?
A. 10^-4 M
B. 10^-5 M
C. 10^-6 M
D. 10^-7 M
Question 6
The genetic code is a set of rules that translates nucleotide sequences into
A. Proteins
B. DNA
C. RNA
D. Genes
Question 7
A 2.5-liter flask contains 1.5 liters of oxygen gas at 25°C and 1 atm. If 0.5 liters of oxygen gas is removed, what is the new partial pressure of oxygen in the flask?
A. 0.5 atm
B. 0.75 atm
C. 1 atm
D. 1.25 atm
Question 8
The diagram below shows the structure of a plant cell. Which part is responsible for photosynthesis?
A. Vacuole
B. Mitochondrion
C. Chloroplast
D. Nucleus
Question 9
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. A
B. B
C. C
D. D
Question 10
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a characteristic 'chain of beads' appearance under the microscope. Which of the following is the most likely cause of this infection?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Escherichia coli
D. Klebsiella pneumoniae
Question 11
A 2.5 g sample of a compound containing only carbon and hydrogen is analyzed by combustion. If the amount of carbon dioxide produced is 1.8 g and the amount of water produced is 0.5 g, what is the empirical formula of the compound?
A. C2H4
B. C3H6
C. C4H8
D. C5H10
Question 12
A diagram of a simple circuit is shown below. If the battery has a voltage of 9 volts and the resistor has a resis\tance of 2 ohms, what is the current in the circuit?
A. 3 A
B. 4 A
C. 5 A
D. 6 A
Question 13
A 2.5 L flask contains 0.5 M HCl. If 0.1 g of NaOH is added to the solution, what is the resulting pH?
A. 1
B. 2
C. 3
D. 4
Question 14
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
Question 15
In a study on the effect of temperature on the growth of E. coli, the following data were collected:
A. y = 2x + 1
B. y = 3x - 2
C. y = 4x + 3
D. y = 5x - 1

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