NEET Biology question

Not in NEET syllabus

Which of the following mechanisms can explain the transport of sucrose from source to sink?

(A)Osmotic movement of water into sugar-loaded sieve tube cells, which creates a higher hydrostatic pressure in the source than in the sinkCorrect
(B)Tension created by differences in pressure potential between source and sink
(C)Active absorption of sucrose through sieve tube membrane driven by a specific pump
(D)Transpiration and active transport of sugar from source to sink

Answer: (A)

Solution

According to Munch's pressure flow (mass flow) hypothesis, sucrose is actively loaded into sieve tubes at the source, lowering their water potential. Water then enters the sieve tubes from the adjacent xylem by osmosis, raising

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Question ID VK-127801