POST UTME AAUA 2018 Biology | Objective

Are you preparing for POST UTME AAUA exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In a photosynthetic pathway, what is the net result of the light-dep\endent reactions?
Correct A. ATP and NADPH
B. Glu\cose and oxygen
C. Water and carbon dioxide
D. Proteins and lipids

Correct Answer: A

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Question 2
A 2-year-old child is brought to the pediatrician with a history of recurrent diarrhea. The child's stool is tested for the presence of rotavirus. What is the primary mode of transmission of rotavirus?
Correct A. Fecal-oral route
B. Airborne transmission
C. Vector-borne transmission
D. Direct contact

Correct Answer: A

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Question 3
A patient is undergoing a blood transfusion. The blood type of the donor is AB positive, and the recipient's blood type is A negative. What is the primary concern regarding this transfusion?
Correct A. Hemolysis due to incompatibility
B. Anaphylaxis due to allergic reaction
C. Infection due to bacterial contamination
D. Coagulopathy due to clotting disorders

Correct Answer: A

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Question 4
A 35-year-old woman presents with a 2-year history of infertility. Her husband has a normal semen analysis. What is the most likely cause of her infertility?
Correct A. Tubal blockage
B. Endometriosis
C. Polycystic ovary syndrome
D. Thyroid dysfunction

Correct Answer: A

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Question 5
A 60-year-old man presents with a 5-year history of progressive hearing loss. His audiogram shows a sensorineural hearing loss. What is the most likely cause of his hearing loss?
A. Noise-induced hearing loss
Correct B. Age-related hearing loss
C. Ototoxicity due to medication
D. Genetic predisposition

Correct Answer: B

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Question 6
In a photosynthetic pathway, which of the following is the primary acceptor of electrons in the light-dep\endent reactions?
A. P680
Correct B. P700
C. Ferredoxin
D. Plastocyanin

Correct Answer: B

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Question 7
A 30-year-old patient presents with a 2-year history of progressive weakness and fatigue. Physical examination reveals a dist\ended abdomen and a palpable mass in the left upper quadrant. Which of the following is the most likely diagnosis?
A. Polycystic Kidney Disease
B. Nephroblastoma
Correct C. Wilms Tumor
D. Renal Cell Carcinoma

Correct Answer: C

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Question 8
A 25-year-old woman presents with a 6-month history of amenorrhea and galactorrhea. Physical examination reveals a palpable mass in the sella turcica. Which of the following is the most likely diagnosis?
Correct A. Prolactinoma
B. Craniopharyngioma
C. Growth Hormone Deficiency
D. Thyroid-Stimulating Hormone Deficiency

Correct Answer: A

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Question 9
A 35-year-old man presents with a 2-year history of progressive weakness and fatigue. Physical examination reveals a dist\ended abdomen and a palpable mass in the left upper quadrant. Which of the following is the most likely diagnosis?
A. Polycystic Kidney Disease
B. Nephroblastoma
C. Wilms Tumor
Correct D. Renal Cell Carcinoma

Correct Answer: D

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Question 10
A 20-year-old woman presents with a 1-year history of amenorrhea and galactorrhea. Physical examination reveals a palpable mass in the sella turcica. Which of the following is the most likely diagnosis?
Correct A. Prolactinoma
B. Craniopharyngioma
C. Growth Hormone Deficiency
D. Thyroid-Stimulating Hormone Deficiency

Correct Answer: A

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Question 11
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells 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 convert light energy into chemical energy is called
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation

Correct Answer: A

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Question 13
The type of respiration that occurs in the presence of oxygen is called
Correct A. Aerobic Respiration
B. Anaerobic Respiration
C. Fermentation
D. Glycolysis

Correct Answer: A

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Question 14
The process by which an organism moves from one environment to another is called
Correct A. Migration
B. Hibernation
C. Camouflage
D. Metamorphosis

Correct Answer: A

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Question 15
The type of symbiotic relationship in which one organism benefits and the other is harmed is called
A. Mutualism
B. Commensalism
Correct C. Parasitism
D. Amensalism

Correct Answer: C

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Question 16
In the context of cellular respiration, what is the role of the electron transport chain in generating ATP?
A. To produce NADH and FADH2
Correct B. To generate a proton gradient across the mitochondrial membrane
C. To produce ATP directly
D. To reduce oxygen to water

Correct Answer: B

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Question 17
A 2-year-old child is diagnosed with a genetic disorder that affects the production of a specific enzyme involved in the breakdown of a particular amino acid. Which of the following is the most likely outcome?
A. The child will experience a deficiency in the amino acid
B. The child will experience an excess of the amino acid
Correct C. The child will experience a buildup of toxic byproducts
D. The child will experience no symptoms

Correct Answer: C

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Question 18
A researcher is studying the effects of a new antibiotic on a bacterial culture. Which of the following is the most likely outcome?
A. The bacteria will become resis\tant to the antibiotic
Correct B. The bacteria will die off rapidly
C. The bacteria will experience a temporary slowdown in growth
D. The bacteria will experience no change

Correct Answer: B

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Question 19
A 30-year-old woman is experiencing difficulty getting pregnant. After undergoing a series of tests, she is diagnosed with a condition that affects the production of a specific hormone involved in ovulation. Which of the following is the most likely treatment?
A. Hormone replacement therapy
Correct B. Fertility medications
C. Surgery to remove the ovaries
D. Surgery to remove the fallopian tubes

Correct Answer: B

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Question 20
A researcher is studying the effects of a new pesticide on a population of insects. Which of the following is the most likely outcome?
A. The insects will become resis\tant to the pesticide
Correct B. The insects will die off rapidly
C. The insects will experience a temporary slowdown in growth
D. The insects will experience no change

Correct Answer: B

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Question 21
In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining homeostasis?
A. To regulate blood pressure
B. To maintain electrolyte balance
Correct C. To remove waste products from the body
D. To regulate body temperature

Correct Answer: C

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Question 22
A diagram of the human eye is shown below. Identify the part labeled A.
Correct A. Cornea
B. Iris
C. Retina
D. Optic nerve

Correct Answer: A

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Question 23
In the context of growth and regulation, what is the primary function of the hypothalamus in regulating body temperature?
A. To regulate body temperature through sweating
B. To regulate body temperature through shivering
C. To regulate body temperature through vasodilation
Correct D. To regulate body temperature through vasoconstriction

Correct Answer: D

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Question 24
A diagram of the human circulatory system is shown below. Identify the part labeled B.
A. Aorta
Correct B. Pulmonary artery
C. Coronary artery
D. Carotid artery

Correct Answer: B

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Question 25
In the context of excretion and osmoregulation, what is the primary function of the kidneys in regulating electrolyte balance?
Correct A. To regulate sodium levels
B. To regulate potassium levels
C. To regulate calcium levels
D. To regulate magnesium levels

Correct Answer: A

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