Which of the following statements is not true for the cell membrane ?

Options

A. It is present in both plant and animal cells.
B. Lipids are present in it as bilayer .
C. Proteins may be peripheral or integral in it.
D. Carbohydrates are never found in it.

Answer

To determine which statement is not true for the cell membrane, we will evaluate each of the provided statements one by one:

1. **Statement: It is present in both plant and animal cells.**
- This statement is true. The cell membrane is indeed present in both plant and animal cells.

2. **Statement: Lipids are present in it as a bilayer.**
- This statement is also true. The cell membrane is primarily composed of a lipid bilayer, which consists of two layers of phospholipids.

3. **Statement: Protein may be peripheral or integral in it.**
- This statement is true as well. The proteins associated with the cell membrane can be classified as peripheral (located on the surface) or integral (embedded within the lipid bilayer).

4. **Statement: Carbohydrates are never found in it.**
- This statement is not true. Carbohydrates are indeed found in the cell membrane, often attached to proteins and lipids, forming glycoproteins and glycolipids.

**Conclusion:**
The statement that is not true for the cell membrane is: "Carbohydrates are never found in it."