GLUCOSE -2 TYPES Glucose has two isomers, α -glucose and β -glucose, with structures: Polysaccharides are formed by the condensation of many glucose units.

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Presentation transcript:

GLUCOSE -2 TYPES Glucose has two isomers, α -glucose and β -glucose, with structures: Polysaccharides are formed by the condensation of many glucose units. Glycogen and starch are formed by the condensation of α - glucose. Cellulose is formed by the condensation of β -glucose. The basic structure and functions of glycogen, starch and cellulose. The relationship of structure to function of these substances in animal cells and plant cells Starter: Using the diagrams of glucose you have, make 2 molecules of glucose! Fastest wins!

Making Glycogen and Starch 1. Good work! Now with your glucose molecules, make maltose + water! 2. With your partner, join the 2 maltose molecules together in the same way you joined the glucoses. 3. Repeat the joining process with other group. 4. You will eventually make glycogen! Outcomes: -Recognise and draw the structural formulas of some basic monosaccharides -Describe how alpha glucose polymerises to form glycogen and starch -Outline with diagrams and how beta glucose polymerises to form cellulose -Explain how these polysaccharide structures are suitable to their functions in animal and plant cells.

Alpha vs Beta -glucose Outcomes: -Recognise and draw the structural formulas of some basic monosaccharides -Describe how alpha glucose polymerises to form glycogen and starch -Outline with diagrams and how beta glucose polymerises to form cellulose -Explain how these polysaccharide structures are suitable to their functions in animal and plant cells.

Making Cellulose Outcomes: -Recognise and draw the structural formulas of some basic monosaccharides -Describe how alpha glucose polymerises to form glycogen and starch -Outline with diagrams and how beta glucose polymerises to form cellulose -Explain how these polysaccharide structures are suitable to their functions in animal and plant cells.

Properties of Polysaccharides  Think about the structures of starch, glycogen and cellulose, why are there structures good for these functions:  Starch is used to store energy in carbohydrates in plants.  Glycogen is used as a store of carbohydrates in animals.  Cellulose is used in making the cell wall in a plant cell. Outcomes: -Recognise and draw the structural formulas of some basic monosaccharides -Describe how alpha glucose polymerises to form glycogen and starch -Outline with diagrams and how beta glucose polymerises to form cellulose -Explain how these polysaccharide structures are suitable to their functions in animal and plant cells.

How I feel I’ve learnt  The aim of todays lesson was:  What I feel I have learnt well:  What I have found tough: Outcomes Please use smiley face emoticons to indicate your confidence level Confidence before lesson Confidence after lesson Recognise and draw the structural formulas of some monosaccharides Describe how alpha glucose polymerises to form glycogen and starch Outline with diagrams and how beta glucose polymerises to form cellulose Explain how these polysaccharide structures are suitable to their functions in animal and plant cells.