Question

The plasma membrane consists mainly of

• A. phospholipids embedded in protein bilayer
• B. proteins embedded in a phospholipid bilayer
• C. proteins embedded in a polymer of glucose molecules
• D. Proteins embedded in a carbohydrate bilayer

Answer 1

The correct option is B

proteins embedded in a phospholipid bilayer

The correct option is B:

Explanation of the correct option:

1. The plasma membrane encloses the components of the cell.
2. It monitors what goes in and out of the cell.
3. It is made up of 2 main components- lipid and protein.
4. A plasma membrane consists of a lipid bilayer.
5. This lipid bilayer is made up of an upper hydrophilic lipid layer, and a lower hydrophobic lipid layer.
6. The plasma membrane contains transport protein.
7. The proteins are embedded in the phospholipid bilayer.

Explanation of the incorrect option(s):

Option A:

The plasma membrane is not made up of a bilayer of protein

Option C:

It is not made up of glucose polymer.

Option D:

The bilayer is made up of lipids, not carbohydrates.

Final answer: The plasma membrane consists mainly of proteins embedded in a phospholipid bilayer.