26 Jun Which form of the exam do you have
Question
EXAM 4 Fall 2010 FORMA
1. Which form of the exam do you have?
A. Form A
B. Form B
2. The HIV virus that causes AIDS specifically attacks and kills helper T cells. This weakens the
immune system because helper T cells:
A. directly destroy cells infected with HIV
B. roam the body looking for "invaders"
C. turn on (activates) the antibody mediated and the cell-mediated defense systems in the
body.
D. produce antibodies
E. turn off the immune response
3. Choose the INCORRECT statement.
A. The antibody-mediated immune response is directed at antigens that are outside of
cells, free in body fluids.
B. The cell-mediated immune response plays a role in the rejection of organ transplants
C. A macrophage presents the antigen to the appropriate helper T cell.
D. Antibodies are effective against viruses that have inserted their genetic material into
the host cell chromosome.
E. Suppressor T cells shut down the immune response after the “invader” (antigen) has
been eliminated from the body.
4. Which part of a virus comes from a previous host cell? The:
A. genetic information
B. the protein coat (capsid)
C. the envelope
D. none of the above
5. Indicate the choice that contains only CORRECT statements.
Statements:
1. Antibodies are specific to one particular antigen.
2. Antibodies are held within the cell that produces them.
3. Antibodies may inactivate (neutralize) a toxin produced by a bacterium.
4. Antibodies are produced by macrophages.
5. Antibodies can only be effective against antigens that are free in the bloodstream (not
within cells).
Choices:
A. 1, 2, 3
B. 2, 3, 4
C. 3, 4, 5
D. 1, 3, 5
E. 1, 3, 4
1
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