Carbohydrates
Chapter Name : Biomolecules |
Sub Topic Code : 102_12_14_01_08 |
Topic Name : Carbohydrates |
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Sub Topic Name : Polysaccharides |
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Introduction
1. Poly saccharides contain a large number of mono saccharide units joined together by glycosidic linkages. 2.They mainly act as the food storage or structural materials. 3.Starch is the main storage poly saccharide of plants. 4.It is the most important dietary source for human beings. 5.High content of starch is found in cereals, roots, tubers and some vegetables. 6.Cellulose occurs exclusively in plants and it is the most abundant organic substance in plant kingdom. 7.It is a predominant constituent of cell wall of plant cells. 8.The carbohydrates are stored in animal body as glycogen. 9.It is also known as animal starch because its structure is similar to amylopectin and is rather more highly branched. 10.It is present in liver, muscles and brain. 11.When the body needs glucose, enzymes break the glycogen down to glucose. 12.Glycogen is also found in yeast and fungi.
Pre-Requisites:
Elements, sugar, organic molecule
Activity:
1.The form of sugar in rice is starch. 2.Plants have cell walls made of cellulose
Real Life Question:
What are cell walls made of?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Carbohydrate | optically active polyhydroxy aldehydes or ketones or the compounds which produce such units on hydrolysis. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Starch in rice, patatoes | Is a poly saccharide |
Real life uses :
Carbohydrates are good sources of energy
Places to visit :
kitchen
Practical examples around us
| Examples | Explainations |
|---|---|
| rice, patatoes | Contain starch |
What you learn in Theory:
1. Poly saccharides contain a large number of mono saccharide units joined together by glycosidic linkages. 2.They mainly act as the food storage or structural materials. 3.Starch is the main storage poly saccharide of plants. 4.It is the most important dietary source for human beings. 5.High content of starch is found in cereals, roots, tubers and some vegetables. 6.Cellulose occurs exclusively in plants and it is the most abundant organic substance in plant kingdom. 7.It is a predominant constituent of cell wall of plant cells. 8.The carbohydrates are stored in animal body as glycogen. 9.It is also known as animal starch because its structure is similar to amylopectin and is rather more highly branched. 10.It is present in liver, muscles and brain. 11.When the body needs glucose, enzymes break the glycogen down to glucose. 12.Glycogen is also found in yeast and fungi.
What you learn in Practice:
Carbohydrates are produced by plants