Which of the following is a principle of the fluid mosaic model of cell membrane structure?

• A. Cell membranes are rigid and static structures.
• B. Carbohydrates form the main structural component of the membrane.
• C. Proteins are embedded in a phospholipid bilayer.
• D. Lipids are covalently bonded to proteins in the membrane.

Answer: (C)

Verified step by step guidance

1. Begin by understanding the fluid mosaic model, which describes the structure of cell membranes.
2. Recognize that the fluid mosaic model suggests that the cell membrane is flexible and dynamic, not rigid and static.
3. Identify the main components of the cell membrane according to the model: phospholipids and proteins.
4. Understand that in the fluid mosaic model, proteins are embedded within the phospholipid bilayer, allowing for movement and interaction.
5. Note that carbohydrates are not the main structural component, and lipids are not covalently bonded to proteins in this model.