carbs and cell structure 0.0 / 5 ? BiologyCellular processes and structureASAQA Created by: MARTHA GREENINGCreated on: 31-05-13 12:04 Structure of cellulose Long unbranched chains of Beta-glucose joined by 1-4 glycosidic bonds. 1 of 10 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. 2 of 10 Structure of starch Mixture of two Alpha-glucose molecules Amylose and Amylopectin joined by glycosidic bonds 3 of 10 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. 4 of 10 Structure of glycogen Lots of branches 5 of 10 Why do animals store glycogen? To store excess glucose. The branches mean it can be release quickly and it is very compact. 6 of 10 What are the differences between a plant cell and a animal cell? Plants have a cell wall, chloroplasts and a vacuole. 7 of 10 Why do plant cells have a cell wall? For support and strength. 8 of 10 Why do plant cells have a vacuole? Where the sap is stored. 9 of 10 Why do plant cells have chloroplasts? For photosynthesis. They contain chlorophyl. 10 of 10
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