fallinursteps
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I need some clarification,does loading of sucrose from source into companion cell requires active transport through cotransporter.i know that hydrogen ions have to be pumped out by proton pump and it is an active transport but how about loading of sucrose.i read some reference and they said loading of sucrose is an active process requiring active transport but my lecturer kept saying that loading of sucrose is a passive process and the word active means it is just being actively loaded??? By the way,unloading of sucrose is a passive process right?
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chershen
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The loading of sucrose is an active process, more precisely - secondary active transport.
Unloading of sucrose is also an active process.

Hope this helps.
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