The sequence in which the amino acids are arranged in a protein is called the primary structure of protein. The primary structure of protein determines its function and is critical to its biological activity. The change of just one amino acid in the sequence can alter its biological activity.
Secondary structure of proteins refers to the arrangement of polypeptide chains which arises as a result of hydrogen bonding. It arises due to regular folding of the back bone of polypeptide chain. It is two types.
(a) α-helix-Globular protein have α-helix structure.
(b) β-pleated-fibrous proteins have α-pleated structure.
What are the different types of RNA found in the cells of organisms? State the functions of each type.
