The membrane that lines the thoracic cavity and covers the lungs is the: MCQ with Answer and Explanation

The membrane that lines the thoracic cavity and covers the lungs is the:
A. Pleura
B. Peritoneum
C. Meninges
D. Pericardium
Answer: Option A
Solution (By JKExamLibrary)
The pleura consists of visceral pleura (adhering to lungs) and parietal pleura (lining chest wall), with pleural fluid between them reducing friction during breathing. Pericardium surrounds the heart, peritoneum lines the abdominal cavity, meninges cover the brain and spinal cord.

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Practice More Biology Questions

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A plasmid used as a cloning vector must have:
A. A large size to hold more DNA
B. A single restriction site only
C. An origin of replication and a selectable marker
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Correct Answer: Option C


Explanation:
A plasmid used as a cloning vector in genetic engineering must have certain essential features: an Origin of Replication (ori) to ensure its replication within the host cell, a Selectable Marker (like an antibiotic resistance gene) to identify and eliminate non-transformants, and at least one unique Restriction Site (cloning site) for the insertion of the foreign DNA.

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Question #2
Which scientist discovered the process of pasteurization?
A. Robert Koch
B. Alexander Fleming
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Correct Answer: Option C


Explanation:
Louis Pasteur developed pasteurization (heating to kill spoilage organisms), vaccines for rabies and anthrax, and disproved spontaneous generation.

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Question #3
In which part of the human body is the pituitary gland located?
A. Brain (hypothalamus region)
B. Pelvis
C. Neck
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Correct Answer: Option A


Explanation:
The pituitary gland is a pea-sized endocrine gland located at the base of the brain, in a bony cavity called sella turcica, attached to the hypothalamus by a stalk (infundibulum). It is divided into anterior and posterior pituitary, secreting hormones that regulate growth, reproduction, metabolism, and other endocrine glands. Thus, it's in the head, not neck or abdomen.

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