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15 Cards in this Set

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Test For Starch

1. Fill test tube with food extract


2. Add two or three drops of iodine solution


If present = Blue Black


If not = Yellow/Light Brown







Test For Sugar

1. Put food sample in a test tube


2. Place a beaker on a heat proof mat, fill half with boiling water.


3. Add Benedicts Solution to test tube with food sample, place in hot water


If present = Red or Orange maybe Green


If not = Blue

Test For Protein

1. Fill test tube with protein sample


2. Add five six drops of Biuret Solution - Copper Sulphate + Sodium Hydroxide


If present = Purple, Violet or Lilac


If not = Blue

Test For Fat

1. Put chopped or grinded sample of fat in a test tube


2. Add ethanol, enough to cover the sample


3. Put a stopper and shake contents


4. Add water to half fill test tube


5. Shake test tube again


If present = White emulsion, looks Cloudy White or Milkey


If not = Nothing Happens

Proteases

Breaks down proteins -> amino acids


- egg

Lipases

Break down fats -> fatty acids and glycerol


- butter

Amylases

Break down starch -> glucose


- bread

Cellulases

Break down cellulose fibres

Enzymes

Proteins produces by organisms that speed up chemical reactions - biological catalyst

Pectinases

Breaks down pectines


- used for extracting fruit juices and softening vegetables

Monocotyledons

● Parallel veins


● Long narrow leaves


● Flowers parts are in multiples of three


● One cotyledon inside each seed

Dicotyledons

● Network of branching veins


● Broad leaves


● Stamens are in multiples of four or five in each flower


● Two cotyledons inside each seed

Osmosis - Dialysis Tubing

Cell A - increases in mass, water diffuses into the cell by osmosis


Cell B- decrease in mass, water diffuses out the cell by osmosis


Osmosis - Potato Cells

A - not as firm as from the start


B - same length and firmness from the start


C - shorter, softer and bendier then from the start

Leaf Test For Starch

Starch present = blue, black


Not present = red/brown