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6. what bond forms between the heavy chains in an antigen?
- Hydrogen (lots of)
- Disulfide Bridges
- Ionic
- Ester
7. what do the cells in the cell mediated response differentiate into?
- Killer t cells, memory cells, suppresor t cells, helper t cells
- memory cells, cytotoxic t cells, helper t cells, suppressor b cells
- memory t cells, antibodies, helper t cells
8. what type of antigens generate an immune response?
9. an antibody has two binding sites, true or false?
10. which of these is correct?
- both B and T cells are activated by antigens
- T cells activate B cells
- B cells activate T cells
11. what is a pathogen?
- an organism that causes disease
- the way that a disease is transmitted
- a group of antigens
12. how is HIV spread?
- on a parasite - particularly a mosquito
- airbourne
- bodily fluids
- food
13. what is passive immunity?`
- when a person is given antibodies
- when the immune system responds to an antigen
- when the immune system responds to an antigen by producing specific antibodies against the antigen
14. what is active immunity
- when the immune system responds to an antigen by producing antibodies specific to the antigen
- when a person is given antibodies
- when the immune system responds to an antigen
15. why are antibiotics ineefective against viruses?
- the virus' protein coat is too thick to be broken down by antibiotics
- they are not living
- it would do more damage to the body than good
- they are too powerful
16. what are antigens?
- molecule that prevents illness
- molecules that generate an immune response
- biological molecule that acts as the defence for the body
- molecules that initiate diseases
17. what is the function of a helper T cell
- activate and stimulate phagocytes and cytotoxic T cells
- secrete antibodies
- kills abnormal or foreign molecules
18. what do memory t cells do
- remember a specific antigen and recognise it the second time round
- remember the shape of the variable region and allocate antigens to the correct region
- connect to the hinge region of an antibody and help it to memorise the shape need to fit its variable regio
19. when does full blown AIDS occur?
- when b cells are not activated and antibodies aren't produced
- when all helper t cells are infected
- when white blood cells are no longer produced
20. what are the disease which are caused from AIDS called?
- opportunistic diseases
- secondary diseases
- resulting infections