Which one of the following compounds is generally translocated in the phloem?
(a) Sucrose
(b) D-glucose
(c) D-mannose
(d) D-fructose
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Which one of the following compounds is generally translocated in the phloem?
(a) Sucrose
(b) D-glucose
(c) D-mannose
(d) D-fructose
Which one of the following compounds is generally translocated in the phloem?
(a) Sucrose
(b) D-glucose
(c) D-mannose
(d) D-fructose
Answer is : (a) Sucrose
The sucrose is actively transported against its concentration gradient into the phloem cells using the electrochemical potential of the proton gradient. This is coupled to the uptake of sucrose with a carrier protein called the sucrose-H+ symporter.