Multiple Choice
In which type of organism would a membrane rich in unsaturated fatty acids be most adaptive?
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6. The Membrane
Biological Membranes
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Damage to which structure will most directly disrupt water balance within a single-celled organism?
A
Plasma membrane
B
Nucleus
C
Ribosome
D
Mitochondrion
Verified step by step guidance1
Understand the role of the plasma membrane: The plasma membrane is a selectively permeable barrier that regulates the movement of water and solutes into and out of the cell. It plays a critical role in maintaining water balance through processes like osmosis.
Consider the function of the nucleus: The nucleus is responsible for storing genetic material and regulating gene expression. While it is essential for cell function, it does not directly regulate water balance.
Evaluate the role of ribosomes: Ribosomes are involved in protein synthesis. They do not have a direct role in controlling water movement or balance within the cell.
Assess the function of mitochondria: Mitochondria are the powerhouses of the cell, generating energy in the form of ATP. They are not directly involved in water balance regulation.
Conclude that damage to the plasma membrane will most directly disrupt water balance, as it is the structure responsible for controlling the movement of water and solutes in and out of the cell.
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