Food And Energy Flashcards
Starch test result
Iodine turns from yellow brown to blue black if positive
Sugar test name and result
Benedict’s test
Add Benedict’s solution to heat in a water bath the solution should change from blue to brick red precipitate
Protein test name and result
Biuret test
Add sodium hydroxide and then a few drops of copper surface and shake
Solution turns blue to lilac
Fat test name and result
Ethanol test
Shake the fat with ethanol and then add equal amount of water
Colourless ethanol changes to cloudy white emulsion
What is a carbohydrate
Biological molecule formed by sugar sub units. Carbs differ by having different numbers or types of sugar sub-unit
What are simple sugars made of
Glucose or lactose
What do complex carbs include
Starch, glycogen and cellulose
What are complex carbs made of
Glucose units linked together
What is cellulose
Structural carbohydrate
What are glycogen and starch main use
Storage molecules
How are starch and glycogen adapted to be storage molecules
Can branch and coil up making them very compact meaning glucose units can be contained in a very small volume
What are proteins
Biological molecule formed by sub units of amino acids. They differ by containing different types or numbers of amino acids or by different amino acids being arranged in different sequences
How many different types of amino acids is there
20
What is fat
Basic unit of fat is glycerol and three fatty acids
What are fats also called
Lipids
