CAPE Biology Unit 2 · 2011 · Paper 1 · Question Q35

Item 35 refers to the following diagram. Which of the following correctly identifies the structure labelled X in the diagram?

1. (A)Hinge region
2. (B)Variable region
3. (C)Disulphide bridge
4. (D)Light polypeptide chain

This question uses a figure or table from the paper — you'll see it when you practise.