Understand the roles of Carbohydrates, Fats, and Proteins, and learn the laboratory tests used to detect them in food.
Hook on carbohydrates providing instant energy.
Explain the iodine test for starch.
Starch is a common type of carbohydrate found in our diet, especially in foods like potatoes, rice, and bread. We can detect its presence using a simple chemical test in the laboratory.
Visual of dropping iodine on a potato.
Adding diluted iodine solution to a starch-rich food like potato results in a blue-black color change.
Fill in the blanks regarding carbs and the starch test.
Explain fats as stored energy and how to test for them.
Like carbohydrates, fats are also energy-giving foods. However, fats act as a source of stored energy and actually provide much more energy than the same amount of carbohydrates.
MCQ on the fat test.
A student wants to find out if a handful of crushed peanuts contains fat. What is the simplest and most accurate way to test this?
Summary checkpoint for carbs and fats.