POST UTME ACHIEVERS UNIVERSITY 2017 Biology | Objective

Are you preparing for POST UTME ACHIEVERS 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 process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
Correct A. Reabsorption of ions from the filtrate
B. Secretion of ions into the filtrate
C. Excretion of ions in the urine
D. Regulation of ion channels in the kidneys

Correct Answer: A

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Question 2
A diagram of the human respiratory system is shown below. What is the function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide
B. Filtering of blood
C. Production of mucus
D. Regulation of breathing

Correct Answer: A

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Question 3
In the context of evolutionary theory, what is the term for the process by which a species becomes adapted to its environment?
Correct A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation

Correct Answer: A

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Question 4
A diagram of the human circulatory system is shown below. What is the function of the coronary arteries?
Correct A. Supplying oxygen to the heart muscle
B. Regulating blood pressure
C. Filtering blood
D. Producing red blood cells

Correct Answer: A

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Question 5
In the context of evolutionary theory, what is the term for the process by which a species becomes extinct?
A. Natural selection
B. Genetic drift
C. Gene flow
Correct D. Mass extinction

Correct Answer: D

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Question 6
In a population of 1000 individuals, 50% are heterozygous for the ABO blood group gene. If 200 individuals are randomly selected for blood typing, what is the expected frequency of the genotype AA?
Correct A. 0.05
B. 0.10
C. 0.15
D. 0.20

Correct Answer: A

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Question 7
A 2.5 L flask contains 0.5 M glu\cose solution. If 10 mL of 1 M HCl is added to the solution, what is the new concentration of glu\cose?
A. 0.45 M
Correct B. 0.50 M
C. 0.55 M
D. 0.60 M

Correct Answer: B

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Question 8
A plant with the genotype RrSs is crossed with a plant with the genotype rrSS. What is the probability that the offspring will have the phenotype red flowers?
A. 0.25
Correct B. 0.50
C. 0.75
D. 0.90

Correct Answer: B

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Question 9
A 5 mL sample of 0.1 M NaOH is added to 10 mL of 0.1 M HCl. What is the resulting pH?
A. 1
B. 2
C. 3
Correct D. 4

Correct Answer: D

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Question 10
A 2.0 L flask contains 0.2 M glu\cose solution. If 5 mL of 1 M HCl is added to the solution, what is the new concentration of glu\cose?
A. 0.40 M
B. 0.45 M
Correct C. 0.50 M
D. 0.55 M

Correct Answer: C

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Question 11
In a photosynthetic pathway, which of the following pigments is primarily responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
Correct D. Phycobiliproteins

Correct Answer: D

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Question 12
A 25-year-old woman presents with symptoms of hyperthyroidism. Which of the following hormones is most likely responsible for her condition?
Correct A. Thyroid-stimulating hormone (TSH)
B. Triiodothyronine (T3)
C. Thyroxine (T4)
D. Thyrotropin-relea\sing hormone (TRH)

Correct Answer: A

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Question 13
A diagram of a cell membrane is shown below. Which of the following structures is responsible for the movement of molecules across the membrane?
Correct A. Pore
B. Channel
C. Transporter
D. Receptor

Correct Answer: A

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Question 14
A 35-year-old man presents with symptoms of chronic kidney disease. Which of the following organs is most likely affected?
A. Liver
B. Pancreas
Correct C. Kidneys
D. Spleen

Correct Answer: C

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Question 15
A diagram of a nerve cell is shown below. Which of the following structures is responsible for the transmission of nerve impulses?
A. D\endrite
Correct B. Axon
C. Cell body
D. Myelin sheath

Correct Answer: B

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Question 16
A 28-year-old woman presents with symptoms of anemia. Which of the following blood cells is most likely affected?
Correct A. Erythrocytes
B. Leukocytes
C. Thrombocytes
D. Platelets

Correct Answer: A

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Question 17
A diagram of a muscle cell is shown below. Which of the following structures is responsible for the contraction of the muscle?
A. Myofibril
Correct B. Sarcomere
C. Z-line
D. M-line

Correct Answer: B

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Question 18
A 40-year-old man presents with symptoms of hypertension. Which of the following organs is most likely affected?
A. Heart
B. Lungs
Correct C. Kidneys
D. Liver

Correct Answer: C

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Question 19
A diagram of a bone cell is shown below. Which of the following structures is responsible for the formation of bone tissue?
A. Osteoblast
B. Osteoclast
C. Osteoid
D. Bone matrix

Correct Answer: VIEW ANSWER

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Question 20
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells is known as
Correct A. Mitosis
B. Meiosis
C. Binary Fission
D. Endoreduplication

Correct Answer: A

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Question 21
The process by which plants convert light energy into chemical energy is known as
A. Respiration
Correct B. Photosynthesis
C. Transpiration
D. Translocation

Correct Answer: B

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Question 22
The movement of molecules from an area of high concentration to an area of low concentration is known as
A. Osmosis
Correct B. Diffusion
C. Active Transport
D. Passive Transport

Correct Answer: B

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Question 23
The process by which an organism's genetic information is passed from one generation to the next is known as
A. Mutation
B. Genetic Drift
C. Gene Flow
Correct D. Heritability

Correct Answer: D

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Question 24
The process by which an organism's genetic information is altered is known as
Correct A. Mutation
B. Genetic Drift
C. Gene Flow
D. Natural Selection

Correct Answer: A

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Question 25
The process by which an organism's genetic information is passed from one generation to the next is known as
Correct A. Heritability
B. Genetic Drift
C. Gene Flow
D. Mutation

Correct Answer: A

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