What persentage of proteins and lipids respectively are present in the membrane of human erythrocyte cell?

Options

A. 40% and 52%
B. 52% and 40%
C. 48% and 52%
D. 50% and 42%

Answer

To determine the percentage of proteins and lipids present in the membrane of a human erythrocyte cell, we can follow these steps:

### Step 1: Identify the components of the erythrocyte membrane
The erythrocyte (red blood cell) membrane consists of three main types of biomolecules: proteins, lipids, and carbohydrates.

### Step 2: Understand the composition percentages
From the information provided, we know the following approximate percentages for the components in the erythrocyte membrane:
- Proteins: 52%
- Carbohydrates: 7%
- Lipids: 40%

### Step 3: Confirm the total composition
To ensure the percentages add up correctly, we can sum them:
- Proteins (52%) + Carbohydrates (7%) + Lipids (40%) = 99%
This indicates that there may be a small percentage (1%) of other components, such as minerals and water.

### Step 4: State the answer
Thus, the percentage of proteins and lipids in the membrane of a human erythrocyte cell is:
- Proteins: 52%
- Lipids: 40%

### Final Answer:
- Proteins: 52%
- Lipids: 40%

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