Leaving Cert Biology: Food
- Created by: leah
- Created on: 28-12-12 14:49
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- Food
- carbohydrates
- monosaccarides: glucose, froctose
- Disaccharides: sucrose, maaltose, lactose.
- Polysaccharides: starch, cellulose, glycogen.
- Tests
- Reducing Sugars: DENEDICTS TEST. Brick-Red.
- Starch: IODINE DROPS. Blue-Black.
- Fat: BROWN PARER. Translucent Spot.
- Protein. SODIUM HYDROXIDE, COPPER SULFATE. Purple/ violet.
- Vitamin
- Water Sol. VIT C. Found in Citrus Fruits. Forms connective tissue, helps wounds heal, bones and teeth. Def Disease is scurvy.
- Fat Sol. VIT D. Found in liver, fish oils, milk, egg yolk, UV light from sun. absorbs calcium from intestine for bones and teeth. Def Disease rickets.
- Metabolic rxns
- CATABOLIC. complex molecules broken down to sipler ones. eg. digestion, respiration.
- ANABOLIC. Convert smaller molecules into larger ones. eg photosynthesis.
- Lipids
- Triglyceride. One glycerol linked with three fatty acids..
- Phospholipids. one fatty acid replaced by a phosphate.
- Sources: butter, margarine, olives, meat fat.
- Proteins
- Petide. Less than 20 aa.
- polypeptide. More than 20 aa.
- A protein in a long polypeptide with at least 200 amino acids. Sources : fish meat eggs.
- Made up of amino acids. there are 20 common amino acids found in protein.
- carbohydrates
- Made up of amino acids. there are 20 common amino acids found in protein.
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