ABO blood groups are dependent on _______ present on plamsa membrane of the red blood cells and protrude from its sufrface

Options

A. sugar polymers
B. starch
C. special lipids
D. phenols

Answer

**Step-by-Step Solution:**

1. **Understanding ABO Blood Groups**: ABO blood groups are determined by the presence of specific antigens on the surface of red blood cells. These antigens are crucial for blood typing and compatibility.

2. **Role of Gene I**: The ABO blood group system is controlled by a single gene known as the gene I. This gene has three alleles: IA, IB, and i.

3. **Alleles and Their Functions**:
- **IA allele**: This allele produces A-type sugar antigens.
- **IB allele**: This allele produces B-type sugar antigens.
- **i allele**: This allele does not produce any sugar antigens.

4. **Presence of Sugar Polymers**: The antigens that determine the blood group are sugar polymers that are present on the plasma membrane of red blood cells. These sugar polymers protrude from the cell surface.

5. **Conclusion**: The correct answer to the question is that ABO blood groups are dependent on **sugar polymers** present on the plasma membrane of the red blood cells.

**Final Answer**: ABO blood groups are dependent on **sugar polymers** present on the plasma membrane of the red blood cells.

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