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The most important reason plants store the sugar as starch rather than glucose is because starch is insoluble in water, meaning it won't dissolve spread out in the water that makes up a large portion of the plant's structure. Glucose is soluble, meaning it will. A more efficient than required reason is that glucose is compressed into tighter spaces when stored as starch, saving space.

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10y ago
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15y ago

Plants store most of their energy as carbohydrates while animals and humand store most of their energy as fats. Despite this differnece, the primary cell energy cycle for both, the citric acid cycle, is most readily driven by glucose.

Starch is of course a general name for polymers of glucose, primarily with 1-6 bonds but also 1-3 branches. Single starch molecules can contain several thousand glucose units.

Storing plant energy, in seeds or from season to season as simple sugars has some difficulties. Sugar is quite soluble in water so it tends to diffuse and be lost from the plant. Also many simple organisms, bacteria and fungi, also insects, can readily consume simple sugars so this means plant sugar stores are readily attacked by other organisms.

Starch by contrast is nearly insoluble in water, and only more advanced organisms can create the amylase enzymes necessary to convert starches to sugars.

The breakdown of starch into sugars is energetically favored, however starch is quite stable at any reasonable environmental temperature.

Water insoluble(almost), stable, readily degraded & accessed via enzymes, but not easily accessed by simple organisms. It's a fine energy store for plants.
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Fats(triglycerides) have an advantage in terms of energy per unit mass (9Cal/gm for fat vs 4Cal/gm for carbs), but they require a considerable and complex mechanism (beta-oxidation) to convert fat to energy. Some plants do store considerable energy as (mostly) unsaturates fats (oils).

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7mo ago

Plants store carbohydrates as starch rather than sugar because starch is a more stable and compact form of energy storage. Starch is also less soluble than sugar, which helps prevent osmotic issues within the plant cells. Additionally, starch can be broken down into glucose when needed for energy through processes such as hydrolysis.

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13y ago

Since glucose is soluble in water it is harder to store because it increases the concentration of the cells upsetting the osmotic pressure of the cytoplasm. but starch is an insoluble molecule therefore it can be stored in the cells.

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11y ago

So the plant has a store of energy when it can't gather enough glucose to support itself. Starch is insoluble so it can be stored within the plant easily and it can be converted back into glucose quite quickly using enzymes.

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13y ago

Starch is actually made up of many glucose molecules linked together to form long chains. Also the three-dimensional shape that starch takes is much more compact then just storing a bunch of glucose molecules jumbled together. Consider this analogy:

Say you went hunting and you shot ten pheasants. Now you had to bring them home for the autumn feast. Would you rather carry each pheasant separately (imagine trying to juggle ten pheasants) or would you rather tie them together into a long strand? Like in the cell, tying them into a strand would make them much easier to carry and store.

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15y ago

Starch has little affect on the osmotic balence of the cell.

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13y ago

Because glucose is easy to dissolve and starch cannot break down or dissolve

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14y ago

Starch is not reactive, compact, insoluble, and easier to store.

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12y ago

Starch is a polymer made by plants to store energy.

well , plants need energy to grow.

this energy they use is from the sun tomake glucose..well cheaa basically

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Q: Why do plants store carbohydrates as starch rather than sugar?
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Related questions

How does plants store carbohydrates?

Starch and cellulose.


What form do plants store their carbohydrates?

starch & cellulose


What do plants store as food for us?

Plants store carbohydrates, such as starch and sugars, as food that we consume. These carbohydrates provide us with energy when we eat plants or plant-based products.


How do insects store carbohydrates?

Insects store carbohydrates as starch. Other animals and plants do the same thing since the starch can become different kinds of saccharides.


What do plants store their extra carbohydrates as?

They store it for the night because, at night there is no sunlightAs the polysaccharide starch.


What type of carbohydrate do plants store for later?

Plants store carbohydrates as starch for later use. Starch is a polysaccharide made up of glucose molecules and serves as a long-term energy storage molecule for plants.


In what form do plants store extra carbohydrates?

It is usually stored as a simple sugar known as glucose. When the food is created, the plant can either consume it right away or store it. If it consumes it, then it is starch.


What do plants store carbohydrates as?

In plants, carbohydrates are stored as starch. This is their main storage of energy, and it's all over the plants, helping it to continue to grow come springtime.


What kind of carbohydrate do plants use to store energy?

Carbohydrates are stored as complex sugars. The larger molecules are called starch and bigger than that is cellulose.


Which plants store starch?

All green plants store starch


Does fungus have starch granules?

No, fungus does not produce starch granules. Starch is a carbohydrate storage molecule typically found in plants. Fungi store carbohydrates in the form of glycogen instead.


What do plants and animals store excess carbos as?

Plants store excess carbs as starch in their roots, stems, and leaves, while animals store excess carbs as glycogen in their liver and muscles.