Bio- Food Tests
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There is no food test for Vitamins but Vitamins are found in….
Fruit and Veg
Vitamins are needed for….
Healthy body function
What does calcium do?
Strong bones/teeth, healthy muscles, blood clotting.
What does Iron do?
Help make Red blood cells
What does Zinc do?
Helps to heal wounds
What does Vitamin A do?
Found in cheese, eggs and oily fish, Vitamin A fights infection, better vision and keeps skin healthy.
What is Starch found in and what is it needed for?
-Starch is found in Carbohydrates, Pasta, Bread and Potatoes -Starch is needed for long term energy supply/storage
What Solution do you use for testing Starch and describe what colours would show if Starch were present and not present?
-Testing for Starch- Iodine Solution If Starch is present, the Iodine turns from Orange/Brown to Blue/Black.
What is Glucose found in and what is it needed for?
-Glucose is found in sweets, sugar, cakes and fruits -Glucose is needed for energy supply for respiration
What Solution do you use for testing Glucose and describe what colours would show if Glucose were present and not present?
-Benedict’s Solution to test for Glucose -Once heated to above 60°C, if the Benedict’s Reagent turns from Blue to Brick Red if there is Glucose present -If there is only a little present, it will turn pale green
What Solution do you use for testing Protein and describe what colours would show if Protein were present and not present?
-Biuret Solution to test for Protein -If Protein present, the solution will turn from Blue to Lilac.
What is Protein found in and what is it needed for?
-Protein is found in Meats, Beans, Eggs + Fish -Protein is needed for growth of cells and tissue repair
What is Fat found in and what is it needed for?
-Fat is found in Dairy- eg, butter, cheese, animal fat -Fat is needed for insulation + another long-term energy supply
What Solution do you use for testing Fat and describe what colours would show is Fat were present and not present?
-Ethanol (+water) for testing fats -If Lipids are present, the solution should turn from clear, to milky white.
There is no food test for fibre but fibre is needed to…
digest food by preventing constipation. Maintain healthy bowel function.
To keep healthy we should drink — glasses of water a day.
Eight
List two hazards of this experiment, with their corresponding risk and precaution.
1) Hazard- Test Tube Risk- Glass Breakage or cutting Precaution- Use a Test tube rack so that don’t roll off surface and Don’t run with them 2) Hazard- Ethanol Risk- Highly Flammable + Toxic Precaution- No naked flames around Ethanol