1.Define the primary structure

The primary structure is a polypeptide chain of amino acids linked with peptide bonds.

2. Describe how the DNA sequence defines the amino acid sequence in the primary structure
The structure of the dna is very important ,it has specifc order.if one gets moved or is incorrect it can cause mutation.

Different 3 base pairs codes form different amino acids. The amino acids then are linked in the order that they appear in a section of DNA into protiens. The formation of the amino determines how the proteins folds and twists which controls the overall shape. The shape has to be precisely right or the protein will not function properly.

If you have any Deformed proteins they can cause a person to be lactose intolerance, sickle cell animia and to have some allergies.

3. Identify the groups in an amino acid.

1.Amino group
2.R Group (Side chain)
3.Carboxyl group

4. Identify and describe the reaction shown in the diagram.

A Water molecule is removed by condensation between the carboxyl.

5. Describe the role of the peptide backbone, variable side chains and the bonds holding the primary structure together.

Polypeptides and proteins are chains of amino acids held together by peptide bonds.

6. Define the secondary structure.

Secondary structures are polypeptide chains folded into one of two configurations: either an alpha helix, or a beta pleated sheet.

7. Identify the secondary structures from the diagrams below and label the diagrams.

8. Describe a hydrogen bond.
A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the