1. Identify which of the diagrams below represent a protein:
Primary structure
Tertiary structure
1.
Secondary structure
Quaternary structure
2.
3.
4.
2. Name the bond that joins amino acids together in a polypeptide
3. What type of bond is responsible for a proteins secondary
structure?
4. What type of bonds are responsible for a proteins tertiary
structure?
5. The diagram below shows a molecule of haemoglobin.
Explain why it is classed as a quaternary structure
protein.
Challenge questions
What determines the order and sequence of amino acids found in a
protein’s primary structure? How does a ribosome ‘know’ that it needs to
assemble amino acids together in a certain order?
Explain why the shape of globular proteins (e.g. enzymes, hormones,
antibodies) are so essential for their role