Why are there so many differences in the properties of peptides and proteins?

ASeveral amino acid sequences are possible for proteins and peptides
Bsome proteins are enzymes while others are not
Cproteins and peptides include nitrogen
Damino acids form proteins and peptides

Verified Answer :

protiens are very important and they are regarded beneficial 
The protiens and peptides differ in their size protiens are relatively small
There are soi many difference among both because
Several amino acid sequences are possible for proteins and peptides
As there are 20 amino acids and different folding structure
so correct option is A
hope it helps