POST UTME NILE UNIVERSITY 2019 Biology | Objective

Are you preparing for POST UTME NILE 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 a population of 1000 individuals, the frequency of the dominant allele is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?
Correct A. 0.4
B. 0.2
C. 0.8
D. 0.1

Correct Answer: A

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Question 2
A cell in interphase has a DNA content of 2C. If the cell enters mitosis and undergoes one round of DNA replication, what will be the DNA content of the daughter cells after mitosis?
A. 2C
Correct B. 4C
C. 1C
D. 3C

Correct Answer: B

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Question 3
A diagram of a plant cell is shown below. Identify the part labeled A.
Correct A. Mitochondria
B. Nucleus
C. Cell wall
D. Vacuole

Correct Answer: A

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Question 4
A 5% solution of glu\cose is prepared by dissolving 5g of glu\cose in 100ml of water. What is the concentration of the solution in g/L?
Correct A. 50g/L
B. 25g/L
C. 75g/L
D. 100g/L

Correct Answer: A

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Question 5
A diagram of a simple circuit is shown below. If the battery is replaced with a 9V battery, what will be the new voltage across the resistor?
Correct A. 9V
B. 6V
C. 3V
D. 12V

Correct Answer: A

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Question 6
In the context of evolutionary bio\logy, what is the primary mechanism by which the process of natural selection acts on genetic variation within a population?
A. Genetic drift
B. Gene flow
C. Mutation
Correct D. Differential reproduction

Correct Answer: D

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Question 7
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 8
In the context of classification of living things, what is the primary criterion used to distinguish between the kingdoms Plantae and Animalia?
A. Cell wall presence
B. Cell membrane structure
C. Cell division method
Correct D. Nutritional mode

Correct Answer: D

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Question 9
A diagram of the human circulatory system is shown below. Which part of the system is responsible for transporting oxygenated blood from the lungs to the rest of the body?
Correct A. Aorta
B. Pulmonary artery
C. Coronary artery
D. Femoral artery

Correct Answer: A

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Question 10
In the context of evolutionary theory, what is the primary mechanism by which genetic variation is introduced into a population?
Correct A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection

Correct Answer: A

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Question 11
The process of hormonal coordination in the human body involves the release of hormones from the hypothalamus, which then stimulate the pituitary gland to release other hormones. Which of the following hormones is responsible for stimulating the release of growth hormone from the anterior pituitary gland?
Correct A. Growth Hormone-Relea\sing Hormone (GHRH)
B. Thyroid-Stimulating Hormone (TSH)
C. Adrenocorticotropic Hormone (ACTH)
D. Follicle-Stimulating Hormone (FSH)

Correct Answer: A

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Question 12
The theory of evolution by natural selection states that populations of organisms will evolve over time through the process of variation, mutation, genetic drift, and gene flow. Which of the following is NOT a mechanism of evolution?
A. Mutation
B. Genetic Drift
C. Gene Flow
Correct D. Artificial Selection

Correct Answer: D

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Question 13
The human body is composed of four main types of tissues: epithelial, connective, muscle, and nervous. Which of the following is a characteristic of epithelial tissue?
A. It is found in the dermis layer of the skin
Correct B. It is composed of a basement membrane
C. It is found in the muscular layer of the heart
D. It is composed of a network of blood vessels

Correct Answer: B

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Question 14
The classification of living things is based on the following characteristics: cell structure, cell division, genetic material, and body symmetry. Which of the following is a characteristic of prokaryotic cells?
A. Presence of a true nucleus
B. Presence of a cell wall
Correct C. Absence of a true nucleus
D. Presence of mitochondria

Correct Answer: C

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Question 15
The reproductive system of humans is composed of the male and female reproductive organs. Which of the following is a characteristic of the male reproductive system?
A. It produces eggs
Correct B. It produces sperm
C. It is composed of a uterus
D. It is composed of a vagina

Correct Answer: B

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Question 16
In the xylem, what is the primary function of the tracheids?
Correct A. Transport of water and minerals from the roots to the leaves
B. Production of sugars through photosynthesis
C. Storage of food and water in the plant
D. Regulation of gas exchange between the plant and the atmosphere

Correct Answer: A

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Question 17
Which of the following is an example of a symbiotic relationship in an e\cosystem?
A. Predator-prey relationship between a lion and a zebra
Correct B. Mutualism between bees and flowers
C. Competition between two species for resources
D. Commensalism between a remora fish and a shark

Correct Answer: B

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Question 18
What is the primary function of the sense organ known as the vestibular apparatus?
A. Detection of changes in sound pressure
Correct B. Maintenance of balance and orientation in space
C. Regulation of body temperature
D. Detection of light and color

Correct Answer: B

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Question 19
In the context of eco\logy, what is the term for the movement of organisms from one region to another?
A. Migration
B. Hibernation
C. Diapause
Correct D. Emigration

Correct Answer: D

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Question 20
What is the term for the process by which an organism's cells become specialized to perform specific functions?
Correct A. Differentiation
B. Mitosis
C. Meiosis
D. Symbiosis

Correct Answer: A

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Question 21
In a tropical rainforest e\cosystem, the primary consumers are primarily composed of which of the following?
Correct A. Herbivorous insects
B. Fruit-eating bats
C. Fungi-feeding insects
D. Flesh-eating birds

Correct Answer: A

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Question 22
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. What is the expected frequency of the homozygous recessive genotype 'aa'?
Correct A. 0.04
B. 0.08
C. 0.12
D. 0.16

Correct Answer: A

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Question 23
The diagram below shows a cross-section of a human kidney. Which of the following structures is responsible for the filtration of blood?
A. Renal artery
Correct B. Nephron
C. Renal vein
D. Collecting duct

Correct Answer: B

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Question 24
The process of osmoregulation in humans involves the regulation of which of the following?
A. Water balance
B. Sodium balance
C. Potassium balance
Correct D. All of the above

Correct Answer: D

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Question 25
The growth curve of a population of E. coli is shown below. What is the phase of growth where the population is increa\sing exponentially?
A. Log phase
B. Stationary phase
Correct C. Lag phase
D. Accelerated phase

Correct Answer: C

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