Food provides energy and nutrients. The different components of our diet have different sources and functions.
Which element is present in proteins but not in carbohydrates?
Which elements are present in fats and oils?
Carbon and hydrogen only
Carbon and oxygen only
Carbon, hydrogen and oxygen
What is the chemical test for starch?
Iodine solution turns blue-black
Biuret reagent turns purple
Iodine turns yellow-brown
A brick red precipitate forms when a solution is heated with Benedict’s
reagent. What could this solution contain?
What is glycogen made from?
Why are proteins important in a balanced diet?
They provide vital minerals
They are a high energy source
They are needed for growth and repair
Which biological molecule contains the most energy?
Which reagent is used to test for the presence of fat?