digestion
- Created by: rubyboast
- Created on: 18-04-18 19:28
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- Digestion
- enzymes in digestion
- produced by specialised cells in glands and in the lining of the gut
- 1. enzymes pass out of the cells into the digestive system
- 2. come into contact with food molecules
- 3. they catalyse the breakdown of large insoluble food molecules into smaller soluble food molecules
- amylase
- produced in the salivary glands and the pancreas
- is a carbohydrase that breaks down starch into sugar
- protease
- produced in the stomach, pancreas and small intestine
- breaks down proteins into amino acids
- lipase
- produced in the pancreas and small intestine
- breaks down lipids into fatty acids and glycerol
- produced by specialised cells in glands and in the lining of the gut
- Enzymes
- enzymes= biological catalysts
- speed up chemical reactions in living organisms
- properties
- all large proteins
- a space within the protein molecule called the active site
- each enzyme catalyses a specific reaction
- lock and key
- chemical that reacts with the substrate
- it fits into the enzymes active site
- chemical that reacts with the substrate
- denaturing= high temps and extremes of pH make enzymes change shape
- cannot work once denatured - substrate cant fit into active site
- enzymes= biological catalysts
- enzymes in digestion
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