The diagram below is of the Human Immunodeficiency Virus. Some components have been labelled.
Image
(i) ON THE DIAGRAM, identify structures A, B & C. [ 3 ]
(ii) What is an antigen?
[ 2 ]
(iii) Suggest which labelled component of the diagram above is likely to act as an antigen. Give a reason for your answer.
[ 1 ]
(iv) The cells that the virus infects are 15mm in diameter. Calculate how much larger the infected cell is than the virus. You must show your working.
[ 2 ]
(v) Explain why people with the Human Immunodeficiency Virus may develop AIDs.
[ 3 ]
[ Total: 11 ]
