What are essential and non-essential amino acid? Give two examples of each type.

Define the following as related to proteins:
(i) Peptide linkage     (ii) Primary structure    (iii) Denaturation. 

What are the common types of secondary structure of proteins?

Differentiate between globular and fibrous proteins. 

How do you explain the amphoteric behaviour of amino acids?

What is the effect of denaturation on the structure of proteins?

How are vitamins classified? Name the vitamin responsible for the coagulation of blood.

Why are vitamin A and vitamin C essential to us? Give their important sources.

What are nucleic acids? Mention their two important functions.

What is the difference between a nucleoside and a nucleotide?