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Multiple Choice
Which of the following statements best describes the fluid-mosaic model of membrane structure?
A
The membrane is composed solely of lipids with no proteins present.
B
The membrane is composed of a rigid layer of proteins and lipids.
C
The membrane is a flexible layer with proteins embedded in or attached to a bilayer of lipids.
D
The membrane is a static structure with proteins and lipids fixed in place.
Verified step by step guidance
1
Understand the fluid-mosaic model: It describes the structure of cell membranes as a flexible layer made of lipid molecules, with proteins embedded within or attached to this lipid bilayer.
Recognize the role of lipids: The lipid bilayer forms the fundamental structure of the membrane, providing a flexible and dynamic environment.
Identify the role of proteins: Proteins are interspersed within the lipid bilayer, serving various functions such as transport, signaling, and structural support.
Consider the flexibility of the membrane: The term 'fluid' in the fluid-mosaic model indicates that the lipids and proteins can move laterally within the layer, allowing the membrane to be dynamic and adaptable.
Evaluate the given statements: Compare each statement to the characteristics of the fluid-mosaic model, identifying the one that accurately describes the membrane as a flexible layer with proteins embedded in or attached to a bilayer of lipids.