Discuss the role of the cell membrane in both eukaryotic and prokaryotic cells and how its structure supports its function.
Instructor solution
The cell membrane in both eukaryotic and prokaryotic cells serves as a selective barrier that regulates the entry and exit of substances. It is composed of a phospholipid bilayer with embedded proteins that facilitate transport, signal transduction, and cell communication. In eukaryotic cells, the cell membrane also plays a role in compartmentalizing organelles. The fluid mosaic model describes its dynamic nature, allowing for flexibility and the movement of proteins within the lipid bilayer.
Think you've got it?
Which of the following best describes the structure of the cell membrane in both eukaryotic and prokaryotic cells?
- A.
A double layer of proteins with embedded lipids
- B.
A phospholipid bilayer with embedded proteins
- C.
A single layer of phospholipids with embedded carbohydrates
- D.
A rigid layer of cellulose and proteins
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