Question

definition of proteins

Answer 1

Proteins are substances that do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs.
 Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains.

Answer 2

any class of nitrogenous organic compounds that contain one or long chain of ammino acid and are essential part of living organisms they are present in muscle tissues, hairs etc