The membrane which allows the solvent molecules to pass through it and not the solute molucules is called

Options

A. Impermeable membrane
B. Semipermeable membrane
C. Permeable membrane
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Membranes**: First, we need to understand the different types of membranes in biological systems. There are three main types: permeable, semi-permeable, and impermeable membranes.

2. **Defining Permeable Membrane**: A permeable membrane allows both solvent and solute molecules to pass through. This means that substances can freely move across the membrane.

3. **Defining Impermeable Membrane**: An impermeable membrane does not allow any substances, including both solvent and solute molecules, to pass through it.

4. **Defining Semi-Permeable Membrane**: A semi-permeable membrane is selective; it allows only certain molecules to pass through. Specifically, it permits solvent molecules (like water) to pass while restricting the passage of solute molecules.

5. **Identifying the Correct Answer**: Given the question, we are looking for a membrane that allows solvent molecules to pass through but not solute molecules. This description matches that of a semi-permeable membrane.

6. **Conclusion**: Therefore, the answer to the question is option B: semi-permeable membrane.

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