The α-amino acids are the building blocks of proteins. All α-amino acids exist as zwitter ion due to which they show amphoteric behaviour. All amino acids are joined through peptide bond. Proteins are broadly classified as globular proteins and fibrous proteins. Globular proteins are water soluble, whereas fibrous proteins are not. The complete structure of protein is discussed at four different levels i.e. primary, secondary, tertiary and quaternary structures. Protein loses its biological activity in denatured form.

Question

CASE_STUDIESAmino Acids and Their StructurePeptide Bond FormationDenaturation of ProteinsCBSE PYQ3 sub-questions

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Differentiate between:

Draw the zwitter ion structure for sulphanilic acid.

Electrophilic Substitution in Aromatic Amines

Chemical Reactions of Diazonium Salts

Amino Acids and Their Structure

How can the activating effect of –NH₂ group in aniline be controlled ?

Convert Bromoethane to Propanamine.

Give reasons for any 3 of the following observations :

Why do amino acids show amphoteric behaviour ?