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Why is it more appropriate to describe biological membranes as semifluid?
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6. The Membrane
Biological Membranes
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Which of the following does not impact membrane permeability?
A
Temperature
B
Cholesterol content
C
Nucleotide sequence
D
Phospholipid composition
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Understand that membrane permeability refers to the ability of molecules to pass through the cell membrane.
Recognize that temperature affects membrane fluidity; higher temperatures increase fluidity and permeability, while lower temperatures decrease them.
Acknowledge that cholesterol content in the membrane can stabilize the membrane structure, reducing permeability at high temperatures and preventing it from becoming too rigid at low temperatures.
Consider that phospholipid composition, such as the presence of saturated or unsaturated fatty acids, influences membrane fluidity and permeability. Unsaturated fatty acids increase fluidity and permeability.
Realize that nucleotide sequence is related to genetic information and does not directly affect the physical properties of the cell membrane, thus it does not impact membrane permeability.
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