POST UTME LASU 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram shows a simple black and white chemistry apparatus showing a titration setup with a burette labeled A and a flask labeled B. If the burette contains 25 mL of 0.5 M HCl and the flask contains 50 mL of 0.1 M NaOH, what is the number of moles of HCl added to the flask during the titration?
A. 0.025 mol
B. 0.050 mol
C. 0.075 mol
D. 0.100 mol
Question 2
In asexual reproduction, the offspring are genetically identical to the parent. Which of the following organisms reproduces asexually?
A. Bread mold
B. Fruit fly
C. Bacteria
D. Human
Question 3
A plant is placed in a controlled environment with a cons\tant temperature and humidity. What is the primary effect of this environment on the plant's growth?
A. Increased growth rate
B. Decreased growth rate
C. No effect on growth rate
D. Increased root growth
Question 4
The diagram below shows a cross-section of a neuron. Which of the following structures is responsible for the transmission of nerve impulses?
A. Axon
B. D\endrite
C. Cell body
D. Myelin sheath
Question 5
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if certain conditions are met. Which of the following conditions is NOT required for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. Cons\tant population size
Question 6
A plant physio\logist is studying the transport of water and minerals in a plant. What type of transport system is responsible for the movement of water and minerals from the roots to the leaves?
A. Xylem
B. Phloem
C. Cortex
D. Endodermis
Question 7
A 10-liter solution contains 3.2 liters of glu\cose (C6H12O6) and 6.8 liters of water (H2O). Calculate the concentration of glu\cose in the solution in g/L.
A. 320 g/L
B. 400 g/L
C. 480 g/L
D. 560 g/L
Question 8
A patient is diagnosed with a bacterial infection. Which of the following antibiotics is most likely to be effective against this type of infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 9
In the context of nervous system coordination, what is the primary function of the cerebellum?
A. To regulate voluntary movements
B. To control sensory input
C. To manage balance and posture
D. To process visual information
Question 10
What is the primary mechanism by which the pancreas regulates blood glu\cose levels?
A. Insulin secretion
B. Glucagon secretion
C. Somatostatin secretion
D. Gastrin secretion
Question 11
A plant is placed in a controlled environment with a cons\tant temperature and humidity. What is the primary effect of this environment on the plant's growth?
A. Increased growth rate
B. Decreased growth rate
C. No effect on growth rate
D. Increased root growth
Question 12
The theory of evolution by natural selection states that populations will evolve over time as a result of genetic variation and environmental pressures. Which of the following is a key mechanism of evolution?
A. Genetic drift
B. Gene flow
C. Mutation
D. Natural selection
Question 13
The diagram below shows a simple harmonic motion. Which of the following equations represents the displacement of the object as a function of time?
A. ( x(t) = A \cos \( omega t + phi \) )
B. ( x(t) = A \sin \( omega t + phi \) )
C. ( x(t) = A \cos \( omega t - phi \) )
D. ( x(t) = A \sin \( omega t - phi \) )
Question 14
In a tropical rainforest e\cosystem, the primary producers are the plants, which undergo photosynthesis to produce glu\cose. What is the byproduct of the light-dep\endent reactions in photosynthesis?
A. ATP and NADPH
B. Glu\cose and oxygen
C. Water and carbon dioxide
D. Oxygen and glu\cose
Question 15
In a desert e\cosystem, the primary consumers are the insects that feed on the plants. What is the role of the insects in the e\cosystem?
A. To regulate the population of plants
B. To decompose organic matter
C. To pollinate plants
D. To feed on other insects

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