Multiple Choice
Which statement best describes a direct result of damage to a phospholipid bilayer?
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6. The Membrane
Biological Membranes
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Which of the following best describes how the cell wall protects a plant cell?
A
It actively pumps out excess water from the cell.
B
It regulates the passage of ions and molecules into and out of the cell.
C
It provides structural support and prevents the cell from bursting when water enters by osmosis.
D
It produces enzymes that destroy invading pathogens.
Verified step by step guidance1
Understand the function of the cell wall in plant cells: The cell wall is a rigid structure made primarily of cellulose, which provides mechanical support and protection to the cell.
Recognize the role of the cell wall in osmosis: When water enters the plant cell by osmosis, the cell wall prevents the cell from bursting by counteracting the pressure exerted by the incoming water.
Differentiate the cell wall from other cellular structures: Unlike the cell membrane, the cell wall does not regulate the passage of ions and molecules; this is the role of the selectively permeable cell membrane.
Clarify misconceptions: The cell wall does not actively pump out water, nor does it produce enzymes to destroy pathogens. These functions are carried out by other cellular components such as vacuoles and lysosomes.
Conclude with the correct description: The cell wall provides structural support and prevents the plant cell from bursting when water enters by osmosis, which is essential for maintaining cell integrity and function.
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