POST UTME LEAD CITY UNIVERSITY 2020 Biology | Objective

Are you preparing for POST UTME LEAD CITY UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the context of respiratory physio\logy, what is the primary function of the diaphragm?
A. To regulate blood pressure
B. To facilitate gas exchange
Correct C. To increase lung volume
D. To decrease lung volume

Correct Answer: C

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Question 2
A bio\logist observes a population of rabbits in a controlled environment. The population grows according to the \logistic growth model. If the initial population size is 100 rabbits and the carrying capacity is 1000 rabbits, what is the population size after 5 generations?
A. 500
B. 750
C. 900
Correct D. 950

Correct Answer: D

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Question 3
A diagram of the human circulatory system is shown below. What is the function of the pulmonary veins?
Correct A. To transport oxygenated blood from the lungs to the heart
B. To transport deoxygenated blood from the heart to the lungs
C. To regulate blood pressure
D. To increase lung volume

Correct Answer: A

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Question 4
A bio\logist is studying the structure of a plant cell. What is the primary function of the cell wall?
A. To regulate cell growth
Correct B. To provide structural support
C. To facilitate cell division
D. To increase cell volume

Correct Answer: B

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Question 5
A diagram of the human skeletal system is shown below. What is the function of the sternum?
Correct A. To provide structural support for the spine
B. To facilitate breathing
C. To increase lung volume
D. To regulate blood pressure

Correct Answer: A

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Question 6
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Stimulation of appetite
Correct C. Regulation of hormone secretion
D. Inhibition of stress response

Correct Answer: C

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Question 7
A 30-year-old male patient is diagnosed with type 2 diabetes mellitus. Which of the following organs is primarily responsible for glu\cose regulation in this patient?
A. Liver
Correct B. Pancreas
C. Kidneys
D. Adrenal glands

Correct Answer: B

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Question 8
A diagram of the human excretory system is shown below. Identify the organ responsible for filtering waste products from the blood.
A. Liver
Correct B. Kidneys
C. Lungs
D. Skin

Correct Answer: B

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Question 9
A 25-year-old female patient is diagnosed with a rare genetic disorder that affects her ability to synthesize a crucial enzyme. Which of the following classifications of living things is most relevant to this patient's condition?
Correct A. Domain
B. Kingdom
C. Phylum
D. Class

Correct Answer: A

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Question 10
A diagram of the human digestive system is shown below. Identify the organ responsible for the breakdown of proteins into amino acids.
A. Mouth
B. Esophagus
Correct C. Stomach
D. Small intestine

Correct Answer: C

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Question 11
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπσγαλλεντερσ \( anaphase-promoting complex \). What is the primary function of the Δπσγαλλεντερσ?
Correct A. To degrade the cohe\sin proteins that hold sister chromatids together
B. To activate the kinetochore proteins that attach microtubules to the centromere
C. To phosphorylate the histone proteins that compact the chromatin
D. To recruit the spindle checkpoint proteins that monitor the attachment of microtubules to the kinetochore

Correct Answer: A

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Question 12
A species of bird has a beak shape that is well-suited for cracking open seeds. However, this beak shape also makes it difficult for the bird to eat insects. What is an example of an adaptation that has resulted from this trade-off?
A. The bird's beak shape has evolved to become more pointed, allowing it to eat smaller insects
Correct B. The bird's beak shape has evolved to become more robust, allowing it to crack open larger seeds
C. The bird's beak shape has remained the same, and it has developed a specialized tongue to eat insects
D. The bird's beak shape has evolved to become more flexible, allowing it to eat both seeds and insects

Correct Answer: B

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Question 13
In a human kidney, the glomerulus is a tuft of capillaries that is surrounded by a Bowman's capsule. What is the primary function of the glomerulus?
Correct A. To filter waste products from the blood
B. To regulate the amount of water in the blood
C. To produce hormones that control blood pressure
D. To absorb nutrients from the digestive system

Correct Answer: A

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Question 14
A scientist is studying the structure of a protein and wants to determine the secondary structure of the protein. Which of the following techniques would be most useful for this purpose?
A. X-ray crystal\lography
B. Nuclear magnetic resonance (NMR) spectroscopy
Correct C. Circular dichroism (CD) spectroscopy
D. Mass spectrometry

Correct Answer: C

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Question 15
A population of bacteria is growing in a culture medium. The population size is initially 100 bacteria and doubles every 30 minutes. What is the population size after 2 hours?
A. 1000
B. 2000
C. 4000
Correct D. 8000

Correct Answer: D

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Question 16
In the xylem transport system, what is the primary function of the tracheids?
Correct A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and other organic compounds from the leaves to the rest of the plant
C. Storage of water and nutrients in the plant
D. Regulation of water potential in the plant

Correct Answer: A

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Question 17
What is the process by which plants convert light energy into chemical energy?
A. Respiration
Correct B. Photosynthesis
C. Transpiration
D. Translocation

Correct Answer: B

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Question 18
In the cell cycle, what is the stage where the chromosomes condense and become visible under a microscope?
Correct A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: A

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Question 19
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
Correct B. Diffusion
C. Active transport
D. Passive transport

Correct Answer: B

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Question 20
In the human body, what is the primary function of the circulatory system?
Correct A. Transport of oxygen and nutrients to cells
B. Removal of waste products from cells
C. Regulation of body temperature
D. Maintenance of fluid balance

Correct Answer: A

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Question 21
What is the term for the process by which plants release water vapor into the air?
Correct A. Transpiration
B. Respiration
C. Photosynthesis
D. Translocation

Correct Answer: A

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Question 22
In the human body, what is the primary function of the nervous system?
A. Control of body movements
B. Regulation of body temperature
C. Maintenance of fluid balance
Correct D. Proces\sing and transmission of information

Correct Answer: D

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Question 23
What is the term for the process by which cells divide to form two daughter cells?
Correct A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication

Correct Answer: A

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Question 24
In the human body, what is the primary function of the digestive system?
Correct A. Breakdown of food into nutrients
B. Absorption of nutrients into the bloodstream
C. Elimination of waste products
D. Regulation of body temperature

Correct Answer: A

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Question 25
What is the term for the process by which plants convert light energy into chemical energy?
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation

Correct Answer: A

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