carbs and cell structure

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Structure of cellulose
Long unbranched chains of Beta-glucose joined by 1-4 glycosidic bonds.
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Why is cellulose used in walls of plants?
Because the cellulose fibres are strong and arranged in a criss-cross pattern which provides structural strength and elasticty.
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Structure of starch
Mixture of two Alpha-glucose molecules Amylose and Amylopectin joined by glycosidic bonds
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Why is starch used in plants?
To store excess glucose. Starch coils so it is compact and it is insoluble in water so doesnt cause water to enter by osmosis.
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Structure of glycogen
Lots of branches
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Why do animals store glycogen?
To store excess glucose. The branches mean it can be release quickly and it is very compact.
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What are the differences between a plant cell and a animal cell?
Plants have a cell wall, chloroplasts and a vacuole.
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Why do plant cells have a cell wall?
For support and strength.
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Why do plant cells have a vacuole?
Where the sap is stored.
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Why do plant cells have chloroplasts?
For photosynthesis. They contain chlorophyl.
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Other cards in this set

Card 2

Front

Why is cellulose used in walls of plants?

Back

Because the cellulose fibres are strong and arranged in a criss-cross pattern which provides structural strength and elasticty.

Card 3

Front

Structure of starch

Back

Preview of the front of card 3

Card 4

Front

Why is starch used in plants?

Back

Preview of the front of card 4

Card 5

Front

Structure of glycogen

Back

Preview of the front of card 5
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