MHT CET 202624 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 24 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Transport in Plants
MHT CET 2026 · 24 April · Evening Shift · Biology · Transport in Plants
Active absorption of water by roots is _____.
Active absorption of water by roots is _____.
Options
- AAlong the DPD gradient and with the expenditure of ATP (energy).
- BAgainst the DPD gradient and with the expenditure of ATP (energy).
- CAgainst the DPD gradient and without the expenditure of ATP (energy).
- DAlong the DPD gradient and without the expenditure of ATP (energy).
Correct answer
B. Against the DPD gradient and with the expenditure of ATP (energy).
Step-by-step solution
Active absorption of water by roots can be of two types: osmotic and non-osmotic.
In non-osmotic active absorption, water is absorbed against the concentration gradient or DPD (Diffusion Pressure Deficit) gradient. Since the movement of water occurs against the natural gradient (i.e., from a region of higher DPD to a region of lower DPD), it requires the direct expenditure of metabolic energy in the form of ATP.
Therefore, active absorption of water by roots is against the DPD gradient and with the expenditure of ATP.
Answer: Against the DPD gradient and with the expenditure of ATP (energy).
In non-osmotic active absorption, water is absorbed against the concentration gradient or DPD (Diffusion Pressure Deficit) gradient. Since the movement of water occurs against the natural gradient (i.e., from a region of higher DPD to a region of lower DPD), it requires the direct expenditure of metabolic energy in the form of ATP.
Therefore, active absorption of water by roots is against the DPD gradient and with the expenditure of ATP.
Answer: Against the DPD gradient and with the expenditure of ATP (energy).