Question

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 inter-connected protoplasts.
(iv) Polypeptides have more imbibing capacity than polysaccharides.

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

Answer 1

The correct option is A i, iv

Due to the absence of turgor pressure, the pressure potential in a plasmolysed cell is zero.

If a cell is kept in a hypotonic solution it will absorb water and swell. It does not shrink. Shrinking happens if it is placed in a hypertonic solution.

Apoplastic system occurs when the water cannot enter the protoplast. The water only passed through the cell wall and intercellular spaces.

Polypeptides being much more hydrophilic in nature as compared to polysaccharide is the reason why polypeptides imbibe more water leading to a greater imbibing capacity compared to polysaccharides.

So the correct answer is 'i, iv'.