types of nutrients Flashcards
- Carbohydrates
Use: Main source of energy
Examples: Bread, pasta, rice, potatoes
Proteins
Use: For growth and repair of cells
Examples: Meat, fish, eggs, beans
Lipids (Fats and Oils)
Use: Energy store, insulation, protect organs
Examples: Butter, oil, nuts
Vitamins
Use: Keep body healthy, prevent deficiency diseases
Examples:
Vitamin C (for skin, healing)
Vitamin D (for bones)
Minerals
Use: Help with various body functions
Examples:
Iron (for red blood cells)
Calcium (for bones and teeth)
Fibre
Use: Helps food move through the digestive system
Examples: Wholegrain bread, fruit, veg
What equipment is used to crush food in the food test practical?
🟩 A mortar and pestle.
Why is the food mixed with water before testing?
To make a solution that can be tested.
What does the iodine test check for?
Starch
What colour shows starch is present?
Blue-black.
What solution is used to test for sugar (glucose)?
Benedict’s solution.
What must you do to the tube after adding Benedict’s solution?
Heat it in a hot water bath.
What solution is used to test for protein?
Biuret solution.
What colour shows protein is present?
Purple
What colour shows glucose is present?
Green, yellow, or brick-red.
What test is used for fats?
Sudan III test (or ethanol test).
What result shows fat is present in the Sudan III test?
A red layer forms on top.
What is a safety precaution when using Benedict’s solution?
Use a test tube holder with hot water.
