Describe how phagocytosis of a virus leads to presentation of its antigen
The phagosome containing the virus fuses with the lysosome, which then releases hydrolytic enzymes. These enzymes then destroy the virus, and the antigens from the virus are consequently incorporated into the cell membrane of the phagocyte (3 marks).
SF
Related Biology A Level answers
All answers ▸What is the structure of the human gas exchange system- how do we breathe in and out?
How is selective reabsorption acheived in the kidneys?
Guillain-Barré syndrome and multiple sclerosis both cause muscle weakness and loss of muscle function. Suggest and describe how the function of neuromuscular junctions will be affected by Guillain-Barré syndrome and multiple sclerosis.
Explain the sequence of events that occur in the control of the cardiac cycle.