Proteins are the polymers of `alpha`- amino acids. The structure and shape of proteins can be discussed at four different levels - namely primary, secondary, tertiary and quaternary
Give an account of structure and shape of proteins considering the above levels.

Proteins are made up of alpha - amino acids. They are actually polypeptides having high molecular mass. Name an optically inactive alpha - amino acid found in proteins.

Give structures and IUPAC names of all the isomers having molecular formula C_4H_9Br and classify them as primary, secondary or tertiary halides.

Proteins are made up of alpha - amino acids. They are actually polypeptides having high molecular mass. Give one example each for neutral, acidic and basic alpha - amino acids.

Name the following: i) An alpha -amino acid which is not optically active. ii) Pyrimidine bases present in RNA iii) The secondary structure of proteins Iv) The sweetest carbohydrate v) A reducing sugar and a non-reducing sugar

Consider the following statements concerning proteins I. All natural amino acids which are constituents of proteins, are alpha -amino acids. II. alpha -Amino acids are all optically active and have L-configuration. III. alpha -Amino acids are connected by ester linkages. IV. Favourable conformation for the peptide linkages in protein is the alpha -helix arrangement. Of these statements

Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?