LIFE SCIENCE

Detailed explanation-1: -Cells are composed of water, inorganic ions, and carbon-containing (organic) molecules. Water is the most abundant molecule in cells, accounting for 70% or more of total cell mass. Consequently, the interactions between water and the other constituents of cells are of central importance in biological chemistry.

Detailed explanation-2: -A protein molecule is an organic molecule made of the elements carbon, hydrogen, nitrogen, oxygen, and sulfur. The building blocks of protein contain a central carbon linked to a side chain group, an amine group, a carbonyl group and a hydrogen atom.

Detailed explanation-3: -There are seven types of proteins: antibodies, contractile proteins, enzymes, hormonal proteins, structural proteins, storage proteins, and transport proteins.

Detailed explanation-4: -There are many types of molecules, but the most common kinds in biological organisms, like humans, are proteins, carbohydrates, lipids, and nucleic acids.