MHT CET 202623 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 23 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Transport in Plants
MHT CET 2026 · 23 April · Evening Shift · Biology · Transport in Plants
Given below are two statements: Statement (I): Due to endo-osmosis...
Given below are two statements:
Statement (I): Due to endo-osmosis water from surrounding cells and xylem, is absorbed.
Statement (II): Due to decrease in turgor pressure, sugar from photosynthetic cell is forced ultimately into sieve tube of vein
In light of the above statements, choose the most appropriate answer from the options given below with reference to mechanism of sugar transport through phloem.
Statement (I): Due to endo-osmosis water from surrounding cells and xylem, is absorbed.
Statement (II): Due to decrease in turgor pressure, sugar from photosynthetic cell is forced ultimately into sieve tube of vein
In light of the above statements, choose the most appropriate answer from the options given below with reference to mechanism of sugar transport through phloem.
Options
- ABoth Statement (I) and Statement (II) are correct.
- BBoth Statement (I) and Statement (II) are incorrect.
- CStatement (I) is correct but Statement (II) is incorrect
- DStatement (I) is incorrect but Statement (II) is correct.
Correct answer
C. Statement (I) is correct but Statement (II) is incorrect
Step-by-step solution
According to the mass flow hypothesis for the mechanism of sugar transport in phloem, glucose prepared at the source is converted into sucrose and actively transported into the companion cells and then into the sieve tube cells. This active loading creates a hypertonic condition in the phloem.
Statement (I) is correct because the hypertonic condition in the sieve tubes causes water from the adjacent xylem and surrounding cells to move into the phloem by endosmosis.
Statement (II) is incorrect because sugar is loaded into the sieve tube by active transport, not due to a decrease in turgor pressure. In fact, the entry of water by endosmosis builds up a high turgor pressure inside the sieve tube, which forces the phloem sap to move towards the sink where turgor pressure is lower.
Answer: Statement (I) is correct but Statement (II) is incorrect
Statement (I) is correct because the hypertonic condition in the sieve tubes causes water from the adjacent xylem and surrounding cells to move into the phloem by endosmosis.
Statement (II) is incorrect because sugar is loaded into the sieve tube by active transport, not due to a decrease in turgor pressure. In fact, the entry of water by endosmosis builds up a high turgor pressure inside the sieve tube, which forces the phloem sap to move towards the sink where turgor pressure is lower.
Answer: Statement (I) is correct but Statement (II) is incorrect