Choose the incorrect statement about the plasma membrane.

Options

A. The bilipid layer is made up of phosphoglycerides.
B. The membrane of the erythrocyte has approximately 40 per cent protein and 52 per cent lipids
C. Peripheral proteins lie on the surface of membrane while the integral proteins are partially or totally buried in the membrane.
D. The fluid nature of the membrane is important for functions like cell growth and formation of intercellular junctions.

Answer

To solve the question, "Choose the incorrect statement about the plasma membrane," we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Structure of the Plasma Membrane:**
- The plasma membrane consists of a phospholipid bilayer with proteins embedded in it. The proteins can be classified as peripheral (surface) proteins and integral proteins.

2. **Evaluate Option A:**
- **Statement:** "The bilipid layer is made up of the phosphoglyceride."
- **Analysis:** This statement is correct. The plasma membrane is indeed composed of a bilayer of phospholipids, specifically phosphoglycerides.

3. **Evaluate Option B:**
- **Statement:** "The membrane of erythrocyte has approximately 40 percent of a protein and 52 percent of the lipid."
- **Analysis:** This statement is incorrect. The membrane of erythrocytes (red blood cells) actually contains about 52% protein and 40% lipid, with the remainder being carbohydrates. Therefore, this is the incorrect statement we are looking for.

4. **Evaluate Option C:**
- **Statement:** "The peripheral protein lies on the surface of the membrane while the integral protein are partially or totally buried in the membrane."
- **Analysis:** This statement is correct. Peripheral proteins are located on the surface, while integral proteins are embedded within the lipid bilayer.

5. **Evaluate Option D:**
- **Statement:** "The fluid nature of the membrane is important for functions like cell growth and the formation of intracellular junctions."
- **Analysis:** This statement is also correct. The fluidity of the membrane allows for flexibility and movement, which is essential for various cellular functions.

6. **Conclusion:**
- After evaluating all options, we find that Option B is the incorrect statement regarding the plasma membrane.

### Final Answer:
The incorrect statement about the plasma membrane is **Option B**.

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