POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2017 Biology | Objective

Are you preparing for POST UTME JOSEPH AYO BABALOLA UNIVERSITY 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
In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining homeostasis?
A. To regulate blood pH levels
B. To control water balance in the body
Correct C. To remove waste products from the blood
D. To regulate electrolyte balance

Correct Answer: C

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Question 2
A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 3
In the context of evolutionary theories, what is the primary mechanism by which natural selection acts on a population?
A. Genetic drift
B. Mutation
C. Gene flow
Correct D. Differential reproduction

Correct Answer: D

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Question 4
A diagram of the human circulatory system is shown below. Identify the structure labeled A.
A. Aorta
B. Pulmonary artery
C. Lung
Correct D. Heart

Correct Answer: D

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Question 5
A plant is placed in a solution with a high concentration of salt. What is the expected effect on the plant's growth?
A. Increased growth
Correct B. Decreased growth
C. No effect on growth
D. Increased root growth

Correct Answer: B

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Question 6
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
Correct D. No natural selection

Correct Answer: D

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Question 7
In the process of mitosis, what is the function of the centrioles?
Correct A. To form the spindle fibers
B. To divide the cytoplasm
C. To replicate the DNA
D. To form the nuclear envelope

Correct Answer: A

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Question 8
The process of cellular respiration can be divided into three main stages: glycolysis, the citric acid cycle, and oxidative phosphorylation. Which of the following is the primary function of the citric acid cycle?
A. To generate ATP
Correct B. To produce NADH and FADH2
C. To convert pyruvate to acetyl-CoA
D. To synthesize glu\cose

Correct Answer: B

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Question 9
In the process of meiosis, what is the purpose of cros\sing over?
Correct A. To increase genetic variation
B. To decrease genetic variation
C. To increase the number of chromosomes
D. To decrease the number of chromosomes

Correct Answer: A

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Question 10
The process of photosynthesis can be divided into two main stages: the light-dep\endent reactions and the light-indep\endent reactions. Which of the following is the primary function of the light-dep\endent reactions?
A. To produce glu\cose
Correct B. To produce ATP and NADPH
C. To convert CO2 to glu\cose
D. To synthesize ATP

Correct Answer: B

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Question 11
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 called
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 12
The process by which plants make their own food from sunlight, water, and carbon dioxide is called
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis

Correct Answer: A

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Question 13
The study of the structure, behavior, and evolution of the whole organism is called
A. Embryo\logy
B. Histo\logy
Correct C. Eco\logy
D. Taxonomy

Correct Answer: C

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Question 14
The process by which an organism's genetic information is passed from one generation to the next is called
A. Heritability
Correct B. Inheri\tance
C. Mutation
D. Genetic Drift

Correct Answer: B

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Question 15
The theory that all living organisms share a common ancestor is called
A. Evolutionary Theory
Correct B. Common Descent Theory
C. Phy\logenetic Theory
D. Bio\logical Theory

Correct Answer: B

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Question 16
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following organisms is an example of a primary consumer in this e\cosystem?
A. A deer
Correct B. A termite
C. A fungus
D. A bacterium

Correct Answer: B

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Question 17
A patient presents with symptoms of a severe respiratory infection. The patient's sputum sample is cultured and found to contain a large number of bacteria. Which of the following types of bacteria is most likely responsible for this patient's infection?
A. Staphylococcus aureus
B. Pseudomonas aeruginosa
Correct C. Klebsiella pneumoniae
D. Escherichia coli

Correct Answer: C

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Question 18
The human body is composed of several organ systems, each with its own unique functions and structures. Which of the following organ systems is responsible for the regulation of body temperature?
A. Nervous system
B. Circulatory system
C. Respiratory system
Correct D. Integumentary system

Correct Answer: D

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Question 19
Photosynthesis is the process by which plants, algae, and some bacteria convert light energy from the sun into chemical energy in the form of glu\cose. Which of the following is a byproduct of photosynthesis?
Correct A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen

Correct Answer: A

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Question 20
The human digestive system is responsible for breaking down food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for breaking down proteins in the small intestine?
A. Amylase
B. Lipase
Correct C. Tryp\sin
D. Lactase

Correct Answer: C

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Question 21
In the context of cell division, what is the primary function of the centrioles during the prophase stage of mitosis?
Correct A. To form the spindle fibers
B. To replicate the DNA
C. To condense the chromosomes
D. To form the nuclear envelope

Correct Answer: A

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Question 22
A 25-year-old woman presents with a 2-year history of amenorrhea. Her physical examination reveals a normal secondary sexual characteristic, but her pelvic examination shows a small, non-t\ender uterus. What is the most likely diagnosis?
A. Kallmann syndrome
B. Sheehan syndrome
C. Turner syndrome
Correct D. Asherman syndrome

Correct Answer: D

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Question 23
A 35-year-old man presents with a 5-year history of progressive hearing loss. His audiogram shows a flat bone conduction threshold, but a ri\sing air conduction threshold. What is the most likely diagnosis?
Correct A. Otosclerosis
B. Meniere's disease
C. Acoustic neuroma
D. Presbycusis

Correct Answer: A

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Question 24
A 28-year-old woman presents with a 2-year history of recurrent episodes of vertigo, tinnitus, and hearing loss. Her audiogram shows a sensorineural hearing loss. What is the most likely diagnosis?
A. Meniere's disease
Correct B. Acoustic neuroma
C. Otosclerosis
D. Presbycusis

Correct Answer: B

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Question 25
A 30-year-old man presents with a 3-year history of progressive weakness and fatigue. His physical examination reveals a normal muscle strength, but his electromyogram shows a myopathic pattern. What is the most likely diagnosis?
A. Myasthenia gravis
Correct B. Muscular dystrophy
C. Polymyositis
D. Lambert-Eaton syndrome

Correct Answer: B

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