Nutrition And Food Tests Flashcards
What is the food test for starch?
Test: starch test.
Method: add iodine solution.
Result: yellow – brown to blue – black
What is the food test for sugar?
Test: Benedict test?
Method: add Benedict solution and heat in water bath.
Result: blue to, brick red precipitate.
Test for protein/amino acids
Test: biuret test
Method: add biuret, solution and shake
Result: blue to purple – lilac
What is the test for fat?
Test: ethanol test
Method: shake with ethanol and add equal amount water.
Result: turns in the cloudy white emulsion
What elements are carbohydrates made up of?
Carbon oxygen and hydrogen
What are the building blocks of carbohydrates, what do they include include, and what are they made up of?
The building blocks are simple carbohydrates
They include monosaccharides and disaccharides.
They are made up of one sugar unit (glucose) or 2 sugar units (lactose)
What is the function of carbohydrates?
They provide energy rapidly
What’s the complex carbohydrates include?
Starch, glycogen and cellulose
What is starch the energy storage in?
Plants and glycogen in animals
What is cellulose?
A structural carbohydrate used, in plant walls
What elements make up proteins?
Carbon hydrogen, oxygen and nitrogen
What are the building blocks of protein?
Amino acids
What is the function of protein?
Structural – growth and repair.
Functional – enzymes to speed up reactions, antibodies to protect from disease
What elements make up fats/lipids
Carbon hydrogen and oxygen
What are the building blocks of fats/lipids?
Glycerol and fatty acids
