Macromolecules: A macromolecule is a large biological molecule, composed of polysaccharides, proteins and nucleic acids. Macromolecules...

Cell: Cells are the basic unit of a living organism which can survive on its own. On the basis of presence or absence of nucleus, cells...

Enzymes are globular proteins that can act as a biological catalyst to speed up any particular chemical reaction, by lowering the...