Carbohydrates, proteins and lipids and presence of foods

What are the chemical elements present in Carbohydrates?

Carbon (C for Carbohydrates) Hydrogen (H for Hydrates) and Oxygen (O for Ohydrates)

What are the chemical elements present in proteins?

Carbon, Hydrogen, oxygen, nitrogen and sulfur

What are the chemical elements present in Lipids?

Carbon, Hydrogen, Oxygen, (sometimes Nitrogen and Phosphorus)

what is the structure of carbohydrates as a large molecule made up of smaller building blocks?

Building Block = simple sugars like glucose. who’s molecules join together to make Starch in plants and Glucose in Animals

what is the structure of proteins as a large molecule made up of smaller building blocks?

Building Block = amino acids. These form long chains to make a protein

what is the structure of Lipids as a large molecule made up of smaller building blocks?

Lipids are made from Glycerol and Fatty Acids ( 1G + 3FA)

What are the smaller basic units that make up starch, glycogen, proteins and lipids?

Starch and Glycogen = Simple Sugars (Glucose)

Proteins = amino acids

Lipids = fatty acids + glycerol

Which test is used to detect glucose in food?

Benedict’s test: when heated goes from blue to green/ yellow / orange / red

Which test is used to detect starch in food?

Iodine test: from orange/brown to blue-black

Which test is used to detect protein in food?

Biuret test: from blue to lilac / purple

Which test is used to detect fat in food?

Ethanol Emulsion test: from a clear solution to a cloudy-white / milky