Question | Answer |
How many biomolecules are there? What are they? | 4. Proteins, fats, carbohydrates, vitamins |
What is the function of proteins? | growth and repair of cells. Makes muscle, hair and enzymes. |
What is the function of fats? | Supply and store energy, insulate the body, protect internal organs (e.g. kidneys) |
List the 3 different types of carbohydrates | starch, sugar, fibre |
What are the functions of carbohydrates? | Slow release of energy (from starch and fibre) and fast release of energy (sugar), help food move through the intestines to prevent constipation (fibre) |
What is the function of vitamin C? | Keeps gums healthy, forms strong bones |
What is the function of Vitamin D? | Forms strong bones |
List 4 reasons we need food? | To grow, give us energy, repair any damage to the body, to prevent disease |
List some sources of protein | eggs, meat, poultry, fish, milk, cheese, nuts, peas, beans |
List some sources of fats | oils, butter, cream, milk |
List some sources of vitamins | fruit, green vegetables, potatoes, milk, cheese, fish liver oil |
List some sources of starch | bread, potatoes, rice, pasta |
List some sources of sugar | fruits, honey, sweets |
List some sources of fibre | cereals, brown bread, fruit and vegetables |
What happens when foods containing fat are rubbed onto brown paper? | They turn translucent |
What happens when iodine is added to foods containing starch? | They turn blue/black |
What chemical is used to test for starch? | Iodine |
What chemicals are used to test for protein? | sodium hydroxide and copper sulfate |
What chemical is used to test for a reducing sugar (glucose)? | Benedict's Solution |
What colour does Benedict's solution change when in the presence of reducing sugar (glucose)? | Brick Red |
What colour change occurs when testing for protein? | Blue - purple/lilac |
What acts as the control in the food tests? | Water |