Find the incorrect statement from the following .

Options

A. Integral proteins are present on the surface of the membrane.
B. Phospholipids are arranged in a bilayer, which is the major constitution of the cell membrane .
C. The cell membrane of RBCs consists of 40% lipids and 52% protein
D. Both (B) and (C)

Answer

To solve the question of identifying the incorrect statement from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Statements**: We need to analyze each statement provided in the options to determine which one is incorrect.

2. **Evaluate Option 1**:
- **Statement**: "Integral proteins are present on the surface of the membrane."
- **Analysis**: This statement is incorrect. Integral proteins are embedded within the lipid bilayer of the cell membrane, not just on the surface.

3. **Evaluate Option 2**:
- **Statement**: "Phospholipids are arranged in bilayers, which is the major constitution of the cell membrane."
- **Analysis**: This statement is correct. The cell membrane is primarily composed of a bilayer of phospholipids, which is fundamental to its structure.

4. **Evaluate Option 3**:
- **Statement**: "The cell membrane of the RBC consists of 40% lipids and 52% proteins."
- **Analysis**: This statement is also correct. The composition of the red blood cell membrane typically includes around 40% lipids and 52% proteins.

5. **Evaluate Option 4**:
- **Statement**: "Both B and C."
- **Analysis**: Since both statements B and C are correct, this option is misleading in the context of the question, which asks for the incorrect statement.

6. **Conclusion**: Based on the evaluations, the incorrect statement is Option 1: "Integral proteins are present on the surface of the membrane."

### Final Answer:
The incorrect statement is **Option 1**.

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