Describe the structure of an antibody

Antibodies are made from 4 chains of peptides, two heavy chains and two light chains. There is also a constant region (Fc) and a variable region (Fab) which are used to bind to cells and antigens respectively. The chains are held together by disulphide bridges.

JH

Related Biology A Level answers

All answers ▸

Name a substance that can be transported across a membrane by simple diffusion and explain why it is able to be transported by this method.


Describe the differences between active transport and facilitated diffusion.


How are the lungs adapted to increase the rate of diffusion? 3 Marks


Describe Protein Synthesis