Q19 / 200 · MHT CET - Medical 2026 (24 April Shift 2) · Biology
The cortical cell absorbs water from the root hair cell because ___.
- Correct answerAThe cortical cell has more O.P. and more DPD than that of the root hair cell.
- BThe cortical cell has less O.P. and more DPD than that of the root hair cell.
- CThe cortical cell has more O.P. and less DPD than that of the root hair cell.
- DThe cortical cell has same values of O.P. and DPD than that of the root hair cell.
Solution
Water always moves from a region of lower Diffusion Pressure Deficit (DPD) to a region of higher DPD.
For water to move from the root hair cell into the cortical cell, the cortical cell must have a higher DPD than the root hair cell.
Additionally, the Osmotic Pressure (O.P.) of the inner cells (cortical cells) is maintained at a higher level compared to the outer cells (root hair cells) to establish and maintain this DPD gradient, since $DPD = O.P. - T.P.$
Therefore, the cortical cell absorbs water from the root hair cell because it has more O.P. and more DPD.
Answer: The cortical cell has more O.P. and more DPD than that of the root hair cell.
For water to move from the root hair cell into the cortical cell, the cortical cell must have a higher DPD than the root hair cell.
Additionally, the Osmotic Pressure (O.P.) of the inner cells (cortical cells) is maintained at a higher level compared to the outer cells (root hair cells) to establish and maintain this DPD gradient, since $DPD = O.P. - T.P.$
Therefore, the cortical cell absorbs water from the root hair cell because it has more O.P. and more DPD.
Answer: The cortical cell has more O.P. and more DPD than that of the root hair cell.
Hence, the correct answer is option: 'A'.