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JC Biomolecules

QuestionAnswer
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
Created by: aileenwa