NEET BIOLOGY

Detailed explanation-1: -Carbohydrates, lipids and proteins are usually used to provide energy in an organism. Carbohydrates are the primary sources of energy and if the carbohydrate storage gets depleted, the lipids and proteins start to get metabolized.

Detailed explanation-2: -The energy released during a catabolic reaction is conserved in the form of a high-energy molecule (ATP). The biomolecules which are undergoing catabolic reactions are carbohydrates, proteins, and lipids.

Detailed explanation-3: -A biomolecule refers to any molecule that is produced by living organisms. As such, most of them are organic molecules. The four major groups of biomolecules include amino acids and proteins, carbohydrates (especially, polysaccharides), lipids, and nucleic acids.

Detailed explanation-4: -Among biomolecules, nucleic acids, namely DNA and RNA, have the unique function of storing an organism’s genetic code-the sequence of nucleotides that determines the amino acid sequence of proteins, which are of critical importance to life on Earth.

Detailed explanation-5: -They are all organic compounds, that is, they contain the element carbon. Carbohydrates and lipids both contain carbon (C), hydrogen (H), and oxygen (0); proteins contain these three elements plus one or more from nitrogen (N), sulphur (S) and phosphorous (P).