A-LevelBiologyCell membranes and transportMay/June 2023Paper 2 Q310 Marks
Fig. 3.1 shows some fruits (grapes) of the grapevine, Vitis vinifera. Sucrose is transported in the phloem of the grapevine to the fruits. In the fruits, sucrose is hydrolysed by the enzyme sucrase, which is found in cell walls. The glucose and fructose produced by the hydrolysis of sucrose pass through membrane proteins, known as hexose transporters, into the cytoplasm of the fruit cells.
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