A-LevelBiologyTransport in plantsOct/Nov 2012Paper 1 Q261 Mark
Which statement explains why sucrose, rather than glucose, is transported by phloem?
ASucrose can pass through plant cell surface membranes more easily.
BSucrose is a disaccharide and is more easily converted to starch.
CSucrose is a larger molecule.
DSucrose is a non-reducing sugar, so is less reactive.
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The correct answer is D. This question tests the candidate's understanding of transport in plants within the Biologysyllabus. The examiner's mark scheme requires...
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