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: -Proteins contain the elements carbon, hydrogen, and oxygen just as carbohydrates and lipids do, but proteins are the only macronutrient that contains nitrogen.

Detailed explanation-3: -Nitrogen is in all amino acids and nucleotides, and therefore in all proteins and nucleic acids. Nitrogen is also a major component of the chitin that makes up the cell walls of fungi and the exoskeletons of aquatic insects and crustaceans.

Detailed explanation-4: -Answer and Explanation: Nitrogen is not present in fats and carbohydrates. Fats and carbohydrates contain carbon, hydrogen and oxygen atoms. Proteins contain nitrogen and smaller amounts of carbon and hydrogen atoms.

Detailed explanation-5: -Answer and Explanation: Nitrogen is a component of nucleic acids and proteins. Nitrogen is a major component of amino acids which are the building blocks of proteins. Amino acids also contain carbon, hydrogen, and oxygen along with nitrogen but nitrogen alone accounts for 16% of the weight of proteins.