Name __________________________
IB Chemistry Worksheet B-1
1.	Polypeptides and proteins are formed by the condensation reactions of amino acids.
(a)	Give the general structural formula of a 2-amino acid.
 (b)	Give the structural formula of the dipeptide formed by the reaction of alanine and glycine.
	State the other substance formed during this reaction.
(c)	State two functions of proteins in the body.
2.	Electrophoresis can be used to identify the amino acids present in a given protein. 
The protein must first be hydrolyzed.
(i)	State the reagent and conditions needed to hydrolyze the protein, and identify the bond that is broken during hydrolysis.
(ii)	Explain how the amino acids could be identified using electrophoresis.

3.	When many 2-amino acid molecules react together a protein is formed. These proteins have primary, secondary and tertiary structures.
(a)	State the type of intermolecular force responsible for maintaining the secondary structure.
(b)	Describe two other ways in which the tertiary structure of the protein is maintained.