POST UTME LASU 2023 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?
A. 0.36
B. 0.64
C. 0.16
D. 0.84
Question 2
The process of excretion in which waste products are removed from the body through the kidneys and excreted in the urine is called
A. Osmoregulation
B. Ureotelism
C. Uricotelism
D. Nephron function
Question 3
In a xylem vessel, the diameter of the vessel is 100 μm. If the pressure inside the vessel is 10 atm, what is the force exerted on the vessel wall?
A. 100 N
B. 500 N
C. 1000 N
D. 2000 N
Question 4
A diagram of a human kidney is shown below. Identify the part labeled 'A'.
A. Cortex
B. Medulla
C. Papilla
D. Calyx
Question 5
A population of birds is observed to have a high frequency of birds with a specific beak shape. What is the likely explanation for this phenomenon?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 6
In the context of evolutionary bio\logy, what is the primary mechanism by which species adapt to changing environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 7
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2 during glycolysis
C. To pump protons across the mitochondrial inner membrane
D. To reduce oxygen to water
Question 8
A 35-year-old woman presents to the emergency department with a 2-day history of severe headache, fever, and confusion. Physical examination reveals a stiff neck and a positive Kernig's sign. Which of the following is the most likely diagnosis?
A. Meningitis
B. Encephalitis
C. Subarachnoid hemorrhage
D. Brain tumor
Question 9
A plant is classified as belonging to the kingdom Plantae. Which of the following is a characteristic of plants?
A. They have a backbone
B. They are multicellular
C. They have a circulatory system
D. They are heterotrophic
Question 10
A diagram of a human eye is shown below. Identify the part labeled 'B'.
A. Cornea
B. Iris
C. Lens
D. Retina
Question 11
A diagram of the human eye is shown below. Identify the part labeled 'A'?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 12
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 13
A diagram of the human digestive system is shown below. Which part of the digestive system is responsible for absorbing nutrients?
A. Mouth
B. Stomach
C. Small intestine
D. Large intestine
Question 14
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following adaptations would be most beneficial for these herbivores to survive in this environment?
A. Large body size to intimidate predators
B. Specialized digestive system to break down cellulose in plant cell walls
C. Strong claws for climbing and grasping onto branches
D. Camouflage to bl\end in with the surroundings
Question 15
A 2-year-old child is brought to the pediatrician with a history of frequent urination and polydipsia. Physical examination reveals a palpable bladder and a normal blood pressure. Which of the following is the most likely diagnosis?
A. Diabetes mellitus
B. Diabetes insipidus
C. Urinary tract infection
D. Bladder obstruction

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