POST UTME UNN 2017 Biology | Objective

Are you preparing for POST UTME UNN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a by-product of this process?
Correct A. Oxygen gas
B. Carbon dioxide gas
C. Water vapor
D. Nitrogen gas

Correct Answer: A

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Question 2
A cell membrane is selectively permeable, meaning it allows certain subs\tances to pass through while restricting others. Which of the following is an example of a subs\tance that can pass through the cell membrane?
Correct A. Water molecules
B. Glu\cose molecules
C. Protein molecules
D. DNA molecules

Correct Answer: A

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Question 3
The human body has a complex system for regulating the amount of water in the body. Which of the following is a mechanism that helps to conserve water?
Correct A. Kidney function
B. Liver function
C. Pancreas function
D. Adrenal gland function

Correct Answer: A

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Question 4
The process of mitosis involves the division of a cell into two daughter cells. Which of the following stages of mitosis is responsible for the separation of chromosomes?
A. Prophase
B. Metaphase
Correct C. Anaphase
D. Telophase

Correct Answer: C

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Question 5
The classification of living things involves the grouping of organisms based on their characteristics. Which of the following is an example of a characteristic used to classify living things?
Correct A. Cell structure
B. Body symmetry
C. Number of limbs
D. Type of skin

Correct Answer: A

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Question 6
The process of genetic drift in a population of 100 individuals can be described by the equation (P(t) = P_0 left\( 1 - \frac{t}{\tau}\right \)^n), where \( P_0 \) is the initial population size, (t) is time, \( \tau \) is the relaxation time, and (n) is the number of generations. If the population size decreases by 50% after 10 generations, what is the value of (n)?
A. 2
B. 5
Correct C. 10
D. 20

Correct Answer: C

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Question 7
A species of bird has a beak length of 5 cm. If the beak length increases by 10% per generation, what is the beak length of the bird after 5 generations?
A. 6.25 cm
B. 6.5 cm
Correct C. 7.5 cm
D. 8.5 cm

Correct Answer: C

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Question 8
A population of bacteria is growing exponentially with a growth rate of 20% per hour. If the initial population size is 1000, what is the population size after 3 hours?
A. 1600
B. 1800
C. 2000
Correct D. 2200

Correct Answer: D

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Question 9
A species of plant has a seed production of 100 seeds per plant. If the seed production increases by 15% per generation, what is the seed production of the plant after 4 generations?
A. 1150
B. 1200
C. 1250
Correct D. 1300

Correct Answer: D

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Question 10
A population of 1000 individuals is growing at a rate of 5% per year. If the population size is 1200 after 2 years, what is the growth rate per year?
A. 4%
Correct B. 5%
C. 6%
D. 7%

Correct Answer: B

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Question 11
The Hardy-Weinberg principle states that the frequency of alleles in a population will remain cons\tant from generation to generation if five conditions are met. Which of the following is NOT one of the conditions?
Correct A. Large population size
B. Random mating
C. No mutation
D. No genetic drift

Correct Answer: A

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Question 12
In a plant cell, the process of photosynthesis occurs in the chloroplasts. What is the primary function of the thylakoid membranes in this process?
A. Light absorption
Correct B. Electron transport
C. ATP synthesis
D. Carbon fixation

Correct Answer: B

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Question 13
The xylem is a type of vascular tissue in plants that is responsible for transporting water and minerals from the roots to the leaves. What is the primary function of the xylem parenchyma cells?
Correct A. Water absorption
B. Water transport
C. Nutrient storage
D. Cell wall production

Correct Answer: A

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Question 14
The process of digestion in the human body involves the breakdown of large molecules of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for breaking down proteins into amino acids?
A. Amylase
B. Lipase
Correct C. Tryp\sin
D. Lactase

Correct Answer: C

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Question 15
The process of respiration in the human body involves the breakdown of glu\cose to produce energy in the form of ATP. What is the primary function of the mitochondria in this process?
A. ATP synthesis
B. Electron transport
Correct C. Oxidative phosphorylation
D. Glu\cose breakdown

Correct Answer: C

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. What is the probability that a randomly selected individual will be homozygous recessive?
Correct A. 0.04
B. 0.08
C. 0.16
D. 0.32

Correct Answer: A

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Question 17
A plant with the genotype 'AaBb' is crossed with a plant with the genotype 'AaBb'. What is the probability that the offspring will have the genotype 'AABB'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 1.0

Correct Answer: B

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Question 18
A solution of glu\cose (C6H12O6) is titrated with a solution of potassium permanganate (KMnO4). The balanced equation for the reaction is: C6H12O6 + 6O2 → 6CO2 + 6H2O. If 25.0 mL of 0.100 M glu\cose solution is titrated with 0.0500 M KMnO4 solution, what is the number of moles of KMnO4 required?
A. 0.00125
B. 0.00250
Correct C. 0.00500
D. 0.0125

Correct Answer: C

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Question 19
A 2.00 L flask contains a mixture of 1.00 M HCl and 1.00 M NaOH. If 10.0 mL of 2.00 M HCl is added to the flask, what is the resulting concentration of HCl?
A. 0.500 M
Correct B. 0.750 M
C. 1.00 M
D. 1.25 M

Correct Answer: B

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Question 20
A 0.100 M solution of NaOH is titrated with a 0.100 M solution of HCl. If 25.0 mL of HCl is required to reach the equivalence point, what is the volume of NaOH required?
Correct A. 25.0 mL
B. 50.0 mL
C. 75.0 mL
D. 100 mL

Correct Answer: A

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Question 21
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells, each with the same number and kind of chromosomes as the parent cell, is known as
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endosymbiosis

Correct Answer: A

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Question 22
The process by which water moves through a plant, from the roots to the leaves, and is then released into the air as water vapor, is known as
Correct A. Transpiration
B. Photosynthesis
C. Respiration
D. Osmosis

Correct Answer: A

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Question 23
The type of tissue that is found in the walls of blood vessels and is responsible for the contraction and relaxation of the vessel walls, is known as
A. Cardiac Muscle
B. Skeletal Muscle
Correct C. Smooth Muscle
D. Connective Tissue

Correct Answer: C

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Question 24
The process by which an organism's genetic information is passed from one generation to the next, is known as
A. Heritability
Correct B. Inheri\tance
C. Mutation
D. Genetic Drift

Correct Answer: B

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Question 25
The type of classification that groups living organisms based on their evolutionary relationships, is known as
Correct A. Phy\logenetic Classification
B. Taxonomic Classification
C. Morpho\logical Classification
D. Eco\logical Classification

Correct Answer: A

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