BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Proteins, carbohydrates and lipids are made from three basic molecules: carbon, hydrogen and oxygen. However, all proteins contain an element not found in carbohydrates and lipids is nitrogen.

Detailed explanation-2: -Amino acids contain at least one nitrogen (amino) atom, which makes them different from carbohydrates. However, some carbohydrates like glucosamine and mucopolysaccharides do contain nitrogen atoms. The carbohydrates might have a nitrogen atom, but amino acids and proteins always have nitrogen atoms.

Detailed explanation-3: -Since both the functional groups are attached to the a-carbon so they are called a-amino acids. So, nitrogen is only present in proteins and not in carbohydrates and lipids.

Detailed explanation-4: -Carbohydrates are compounds that contain mainly molecules of carbon, hydrogen, and oxygen, although they can also contain nitrogen and phosphorus.

Detailed explanation-5: -The common attributes of carbohydrates are that they contain only the elements carbon, hydrogen and oxygen, and that their combustion will yield carbon dioxide plus one or more molecules of Water.