POST UTME BELLS UNIVERSITY 2019 Biology | Objective

Are you preparing for POST UTME BELLS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the context of respiration, what is the primary function of the mitochondria?
Correct A. To synthesize ATP from glu\cose
B. To break down glu\cose into carbon dioxide and water
C. To transport oxygen from the lungs to the tissues
D. To regulate blood pH levels

Correct Answer: A

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Question 2
A population of rabbits is introduced to a new island with an abundance of food and no natural predators. Which of the following best describes the expected outcome?
A. The population will remain stable due to limited resources
Correct B. The population will increase exponentially due to abundant resources
C. The population will decrease due to genetic drift
D. The population will stabilize at a carrying capacity

Correct Answer: B

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Question 3
A species of bird has a unique mating ritual where the male presents the female with a specific type of food. What is the primary function of this behavior?
A. To establish dominance over other males
Correct B. To attract a mate and increase reproductive success
C. To def\end territory from other birds
D. To communicate with other birds about food sources

Correct Answer: B

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Question 4
A researcher is studying the evolution of a specific trait in a population of finches. Which of the following best describes the expected outcome?
A. The trait will become more complex over time due to genetic drift
B. The trait will become more variable over time due to mutation
Correct C. The trait will become more uniform over time due to natural selection
D. The trait will become less complex over time due to genetic drift

Correct Answer: C

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Question 5
A person with a rare genetic disorder has a mutation in the gene responsible for producing a specific enzyme. Which of the following best describes the expected outcome?
Correct A. The person will be more susceptible to certain diseases due to impaired immune function
B. The person will have a higher risk of developing certain types of cancer due to genetic instability
C. The person will have impaired cognitive function due to reduced enzyme activity
D. The person will have impaired motor function due to reduced enzyme activity

Correct Answer: A

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Question 6
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
Correct B. Genetic recombination
C. Gene duplication
D. Gene deletion

Correct Answer: B

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Question 7
What is the primary function of the xylem in plants?
A. Transport of sugars
Correct B. Transport of water and minerals
C. Support and storage
D. Protection from pathogens

Correct Answer: B

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Question 8
In the context of sense organs, what is the primary function of the cochlea?
A. Detection of light
Correct B. Detection of sound
C. Detection of touch
D. Detection of smell

Correct Answer: B

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Question 9
What is the primary mechanism by which photosynthesis occurs in plants?
A. Cellular respiration
B. Mitosis
Correct C. Photosynthesis
D. Meiosis

Correct Answer: C

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Question 10
In the context of growth and regulation, what is the primary function of the hypothalamus?
A. Regulation of body temperature
Correct B. Regulation of hunger and thirst
C. Regulation of blood pressure
D. Regulation of body weight

Correct Answer: B

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Question 11
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'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.84

Correct Answer: A

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Question 12
A plant cell has a vacuole with a volume of 10 μL. If the osmotic pressure inside the vacuole is 2 atm, what is the concentration of solutes in the vacuole?
A. 0.1 M
Correct B. 0.2 M
C. 0.3 M
D. 0.4 M

Correct Answer: B

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Question 13
A diagram of a plant's xylem and phloem tissues is shown below. What is the function of the xylem tissue?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Storage of starch and proteins
D. Synthesis of ATP

Correct Answer: A

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Question 14
A diagram of a human respiratory system is shown below. What is the function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide
B. Filtering of dust and debris
C. Production of mucus
D. Regulation of body temperature

Correct Answer: A

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Question 15
A diagram of a human digestive system is shown below. What is the function of the pancreas?
A. Production of bile
Correct B. Production of digestive enzymes
C. Absorption of nutrients
D. Storage of waste products

Correct Answer: B

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Question 16
The process of osmoregulation in animals involves the regulation of water and salt balance in the body. Which of the following is a key component of the osmoregulatory system?
Correct A. Kidneys
B. Liver
C. Pancreas
D. Adrenal Glands

Correct Answer: A

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Question 17
The nervous system is responsible for transmitting signals throughout the body. Which of the following types of neurons is responsible for transmitting signals from sensory receptors to the central nervous system?
A. Motor Neurons
Correct B. Sensory Neurons
C. Interneurons
D. Association Neurons

Correct Answer: B

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Question 18
The xylem is a type of vascular tissue found in plants. Which of the following is a key function of the xylem?
Correct A. Transport of water and minerals from roots to leaves
B. Transport of sugars and amino acids from leaves to roots
C. Support and structure of the plant
D. Storage of food and water

Correct Answer: A

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Question 19
The process of evolution is driven by the accumulation of genetic mutations over time. Which of the following is a key mechanism of evolution?
Correct A. Natural Selection
B. Genetic Drift
C. Mutation
D. Gene Flow

Correct Answer: A

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Question 20
The classification of living things is based on the study of their morpho\logy and anatomy. Which of the following is a key characteristic of the kingdom Animalia?
Correct A. Multicellularity
B. Cell wall
C. Chloroplasts
D. Skeletal system

Correct Answer: A

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Question 21
In the context of evolutionary theory, what is the primary mechanism driving the process of speciation in a population?
Correct A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation

Correct Answer: A

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Question 22
A plant cell is placed in a solution containing 0.1 M glu\cose. If the cell membrane is selectively permeable, what will be the net movement of glu\cose molecules into the cell?
A. Osmosis
Correct B. Diffusion
C. Active transport
D. Passive transport

Correct Answer: B

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Question 23
A diagram of a human respiratory system is shown below. Which part of the system is responsible for the exchange of oxygen and carbon dioxide?
A. Trachea
Correct B. Lungs
C. Diaphragm
D. Bronchi

Correct Answer: B

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Question 24
A population of rabbits is growing at a rate of 20% per year. If the initial population is 100 rabbits, what will be the population after 5 years?
A. 1000
B. 1200
C. 1500
Correct D. 2000

Correct Answer: D

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Question 25
A diagram of a plant's xylem and phloem tissues is shown below. Which tissue is responsible for transporting water and minerals from the roots to the leaves?
Correct A. Xylem
B. Phloem
C. Cortex
D. Pith

Correct Answer: A

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