Protein structure
Draw the following amino acids Alanine ( R = CH3)
Cysteine ( R = CH2SH)
Summary questions 1. Draw a simple primary structure
2.What is the name of the reaction that makes a bond between two amino acids?
3. What is the name of the type of bond between two amino acids?
4. What is the name for a polymer of amino acids?
Types of secondary structure. Label and add notes
Types of bonds within a protein Label and add notes
Type of bond
Primary structure Secondary structure Tertiary structure Quaternary
Peptide Bonds
Hydrogen Bonds
Ionic bonds
Disulphide bridges
Hydrophobic and hydrophilic reactions
Denaturing is the breaking of hydrogen and ionic bonds. 1.
In which stages of protein structure are these bonds present?
2.
Why will this prevent the protein functioning?
3.
What causes proteins to denature?
4.
Why do enzymes need the optimum temp and pH?
5. The biological molecule test for a protein is:
Recap questions 1. What is the monomer of a protein? 2. Draw an amino acid and label the amino group, carboxylic acid group and the R group. 3. There are twenty naturally occurring amino acids, how do they differ from each other? 4. Which bond holds together two amino acids and what is this molecule now called? 5. What is the primary structure of a protein and which bonds are present? 6. What is the secondary structure, which bonds are present and can you give examples? 7. What is the tertiary structure, which bonds are present? 8. Describe a globular protein, giving examples. 9. How would you test for the presence of a protein?