Name the purines present in DNA.

How do amino acids from proteins?

What type of bonding occurs in β-pleated structure of proteins?

Give the name and the structural formula of the simplest amino acid.

Define mutation.

Give structural difference is there between α-glucose and β-glucose?

Deficiency of which vitamin causes
(i) rickets, (ii) Scurvy?

What is meant by primary structure of proteins?

Differentiate between aldose and Ketose ? 

What is nucleotide?