The approximate percentage of protein and lipids in the membrane of the human erythrocytes

Options

A. 52 and 40
B. 50 and 50
C. 40 and 52
D. 75 and 25

Answer

To determine the approximate percentage of protein and lipids in the membrane of human erythrocytes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Erythrocytes**:
- Erythrocytes are commonly known as red blood cells. Their primary function is to transport oxygen from the lungs to the rest of the body and return carbon dioxide from the body back to the lungs.

2. **Membrane Composition**:
- The membrane of human erythrocytes is composed of lipids and proteins. These components are crucial for the membrane's structure and function.

3. **Identify the Percentages**:
- According to the information provided, the approximate composition of the membrane is:
- Lipids: 52%
- Proteins: 40%

4. **Select the Correct Option**:
- Given the options:
- A) 52% Protein and 40% Lipids
- B) 40% Protein and 52% Lipids
- C) 50% Protein and 50% Lipids
- D) 75% Protein and 25% Lipids
- The correct option that matches our findings is B) 40% Protein and 52% Lipids.

5. **Conclusion**:
- Therefore, the approximate percentage of protein and lipids in the membrane of human erythrocytes is 40% protein and 52% lipids.

### Final Answer:
**40% Protein and 52% Lipids**

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