POST UTME UNIBEN 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A species of bird has a mean wing length of 10 cm with a s\tandard deviation of 2 cm. If a sample of 16 birds is taken, what is the probability that the sample mean wing length is greater than 12 cm?
A. 0.25
B. 0.50
C. 0.75
D. 0.90
Question 2
A solution of 0.1 M NaCl is prepared by dissolving 6.0 g of NaCl in 100 mL of water. What is the concentration of the solution in terms of molality?
A. 0.6 m
B. 0.8 m
C. 1.0 m
D. 1.2 m
Question 3
A 25-year-old woman presents to the emergency department with a 2-day history of severe headache, fever, and confusion. Her blood pressure is 180/100 mmHg, and her pulse is 120 beats per minute. What is the most likely diagnosis?
A. Meningitis
B. Encephalitis
C. Subarachnoid hemorrhage
D. Hypertensive emergency
Question 4
The sense organ responsible for detecting changes in light intensity is called
A. Eye
B. Ear
C. Nose
D. Tongue
Question 5
A population of bacteria is growing exponentially with a growth rate of 0.05 h^-1. If the initial population size is 1000, what is the population size after 5 hours?
A. 5000
B. 10000
C. 15000
D. 20000
Question 6
In a study on the eco\logy of a freshwater lake, researchers found that the population of a particular species of fish increased exponentially with time. If the initial population was 100 individuals and the population after 5 years was 1600 individuals, what is the carrying capacity of the lake?
A. 1000
B. 2000
C. 3000
D. 4000
Question 7
A 40-year-old male patient presents with a 5-year history of progressive shortness of breath and fatigue. His chest X-ray shows a large mass in the right lung. Which of the following is the most likely diagnosis?
A. Lung cancer
B. Pulmonary embolism
C. Pneumonia
D. Tuberculosis
Question 8
The classification of living things is based on the following hierarchy, in order from most general to most specific?
A. Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
B. Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
C. Kingdom, Phylum, Class, Order, Family, Genus, Species, Domain
D. Domain, Species, Genus, Family, Order, Class, Phylum, Kingdom
Question 9
In the human circulatory system, which of the following vessels is responsible for the transport of oxygenated blood from the lungs to the heart?
A. Pulmonary Vein
B. Pulmonary Artery
C. Aorta
D. Superior Vena Cava
Question 10
A population of bacteria is growing exponentially with a growth rate of 0.03 h^-1. If the initial population size is 500, what is the population size after 4 hours?
A. 1500
B. 3000
C. 4500
D. 6000
Question 11
In the context of respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from glu\cose
B. To break down glu\cose into pyruvate
C. To transport oxygen into the cell
D. To remove waste products from the cell
Question 12
In a photosynthetic pathway, which enzyme catalyzes the conversion of CO2 to a 3-carbon molecule?
A. RuBisCO
B. PEPC
C. Phosphoglycerate kinase
D. Phosphoglycerate mutase
Question 13
A plant cell has a vacuole that contains 0.5 M sucrose solution. If the volume of the vacuole is 100.0 mL, what is the concentration of sucrose in the cytosol?
A. 0.05
B. 0.1
C. 0.15
D. 0.2
Question 14
The e\cosystem that is characterized by a large amount of rainfall and a diverse array of plant and animal species is the?
A. Desert
B. Rainforest
C. Grassland
D. Tundra
Question 15
A 20-year-old female patient presents with a 2-year history of progressive memory loss and confusion. Her MRI scan shows a large mass in the temporal lobe. Which of the following is the most likely diagnosis?
A. Alzheimer's disease
B. Brain tumor
C. Epilepsy
D. Schizophrenia

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