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The following graph displays the results of a study on how sucrose concentration in plant cells affects the rate of sucrose uptake.


From the above data it can be inferred that 
  • a)
    the sucrose uptake is energy independent and no special carrier is involved.
  • b)
    the sucrose uptake is energy dependent and a special carrier is involved.
  • c)
    at lower concentration of sucrose the uptake of sucrose is energy dependent and carrier mediated.
  • d)
    at higher concentration of sucrose the uptake is energy dependent and carrier mediated.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The following graph displays the results of a study on how sucrose con...
Concept:
  • In plants, sucrose is the major transport form for photo assimilated carbon and is both a source of carbon skeletons and energy for plant organs unable to perform photosynthesis (sink organs).
  • As a molecule translocated over distance, sucrose has to pass through a number of membranes.
  • Membrane transport of sucrose has therefore been considered for a long time as a major determinant of plant productivity.
Explanation:
Fig 1:  Sucrose uptake

  • In plants, sucrose is transported over long distance in solution in the phloem sap.
  • This flow of sap occurs in a specialised network of cells, called the sieve elements.
  • Sieve elements lose their nucleus and many organelles during differentiation, but stay connected to companion cells, cells with a high metabolic activity.
  • Sieve elements are connected to form sieve tubes that oppose very little resistance to the flow of sap.
  • The movement of the sap in the phloem occurs through mass flow the driving force for this movement being the entry of sucrose and subsequently water in the sieve tubes in the source organ while, at the other end of the conduit in the sink organs, the continuous unloading of solutes and water would maintain the flow.
  • The accumulation of sucrose in the sieve tube requires the presence of a sucrose transporter to drive this active accumulation.
  • The existence of a carrier system specific for sucrose and responsible for the entry of sucrose in the phloem and the energy for this transport being the proton gradient established by H+/ATPase located in the plasma membrane.
 
 
 hence the correct answer is option 3
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The following graph displays the results of a study on how sucrose concentration in plant cells affects the rate of sucrose uptake. From the above data it can be inferred thata)the sucrose uptake is energy independent and no special carrier is involved.b)the sucrose uptake is energy dependent and a special carrier is involved.c)at lower concentration of sucrose the uptake of sucrose is energy dependent and carrier mediated.d)at higher concentration of sucrose the uptake is energy dependent and carrier mediated.Correct answer is option 'C'. Can you explain this answer?
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The following graph displays the results of a study on how sucrose concentration in plant cells affects the rate of sucrose uptake. From the above data it can be inferred thata)the sucrose uptake is energy independent and no special carrier is involved.b)the sucrose uptake is energy dependent and a special carrier is involved.c)at lower concentration of sucrose the uptake of sucrose is energy dependent and carrier mediated.d)at higher concentration of sucrose the uptake is energy dependent and carrier mediated.Correct answer is option 'C'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about The following graph displays the results of a study on how sucrose concentration in plant cells affects the rate of sucrose uptake. From the above data it can be inferred thata)the sucrose uptake is energy independent and no special carrier is involved.b)the sucrose uptake is energy dependent and a special carrier is involved.c)at lower concentration of sucrose the uptake of sucrose is energy dependent and carrier mediated.d)at higher concentration of sucrose the uptake is energy dependent and carrier mediated.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The following graph displays the results of a study on how sucrose concentration in plant cells affects the rate of sucrose uptake. From the above data it can be inferred thata)the sucrose uptake is energy independent and no special carrier is involved.b)the sucrose uptake is energy dependent and a special carrier is involved.c)at lower concentration of sucrose the uptake of sucrose is energy dependent and carrier mediated.d)at higher concentration of sucrose the uptake is energy dependent and carrier mediated.Correct answer is option 'C'. Can you explain this answer?.
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