Find out the correct pair of statements (i) In completely plasmolysed cell, pressure potential does not contribute to water potential (ii) If a cell is placed in hypotonic solution for longer time , the cell membrane shrinks away from its cell wall (iii) Apoplastic system comprises interconected protoplasts (iv) Polypeptides have more imbibing capacity then polysaccharides

Options

A. `i`, iv
B. `i`,ii
C. ii, iv
D. iii, iv.

Answer

To solve the question, we need to evaluate each of the four statements provided and determine which pairs are correct.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**: "In completely plasmolysed cell, pressure potential does not contribute to water potential."
- In a completely plasmolysed cell, the cell loses water and turgor pressure is absent. Turgor pressure is a component of pressure potential. Since pressure potential is 0 in a plasmolysed cell, it does not contribute to the overall water potential.
- **Conclusion**: This statement is **correct**.

2. **Evaluate Statement (ii)**: "If a cell is placed in hypotonic solution for longer time, the cell membrane shrinks away from its cell wall."
- A hypotonic solution has fewer solutes compared to the inside of the cell, leading to water influx. This causes the cell to swell, not shrink. Shrinking occurs in hypertonic solutions where water leaves the cell.
- **Conclusion**: This statement is **incorrect**.

3. **Evaluate Statement (iii)**: "Apoplastic system comprises interconnected protoplasts."
- The apoplastic system refers to the pathway of water movement through the cell walls and intercellular spaces, not through protoplasts (which are the living parts of the cell excluding the cell wall). Protoplasts are isolated cells, and the apoplastic system does not involve them.
- **Conclusion**: This statement is **incorrect**.

4. **Evaluate Statement (iv)**: "Polypeptides have more imbibing capacity than polysaccharides."
- Polypeptides are generally less hydrophilic compared to polysaccharides. Polysaccharides, being more hydrophilic, have a greater capacity to absorb water. Therefore, this statement is incorrect.
- **Conclusion**: This statement is **incorrect**.

### Final Evaluation:
- The only correct statement is (i). Therefore, the correct pair of statements is **(i)** only.