How do plants make sucrose from glucose and fructose?
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Answer:
Sucrose transport is more efficient for plants. Furthermore, plants and animals have different enzymes and transporters.
Explanation:
Sucrose is formed in the cytosol of photosynthesizing cells from fructose and glucose and is then transported to other parts of the plant. This process is favorable for two reasons:
Sucrose contains more energy than a monosaccharide, so it is more energy efficient, both in transport as in storage.
Secondly, sucrose is a so called non-reducing sugar. This means that it is not oxidized i.e. no intermediate reactions with other molecules occur. This in contrast to glucose that is reactive and can form other products during transport.
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