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Which of these cells is a phagocytic leukocyte that can engulf a foreign bacterium? (Activity 43A)
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| B cell |
| cytotoxic T cell |
| plasma cell |
| helper T cell |
| macrophage |
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_____ interact with the antigen-class II MHC complex presented by macrophages. (Activity 43A)
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| B cells |
| Bacterial cells |
| Helper T cells |
| Epithelial cells |
| Cytotoxic T cells |
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B cells that have been stimulated by interleukin-2 develop into _____. (Activity 43A)
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| macrophages |
| helper T cells |
| cytotoxic T cells |
| antigens |
| plasma cells |
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The role of cytotoxic T cells is the secretion of _____, which plays a role in the _____ immune response. (Activity 43A)
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| antibodies ... antibody-mediated |
| antibodies ... humoral |
| perforin ... cell-mediated |
| perforin ... humoral |
| interleukin-2 ... humoral |
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Clonal
selection is the division of _____ that have been stimulated by binding to
an antigen, which results in the production of cloned _____. (Activity 43A)
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| helper T cells ... plasma cells |
| B cells ... plasma cells and memory cells |
| T cells ... B cells |
| B cells ... macrophages |
| macrophages ... B cells and T cells |
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Which of these cells is responsible for the rapidity of the secondary immune response? (Activity 43A)
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| memory cells |
| cytotoxic T cells |
| macrophages |
| cytokines |
| plasma cells |
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Which of these cells produce and secrete antibodies? (Activity 43A)
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| macrophages |
| cytotoxic T cells |
| helper T cells |
| bacterial cells |
| plasma cells |
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The genetic material of HIV consists of _____. (Activity 43B)
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| single-stranded DNA |
| single-stranded RNA |
| double-stranded DNA |
| double-stranded RNA |
| none of the above |
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Which of these binds to receptor molecules on the host cell membrane? (Activity 43B) 
|
| A |
| B |
| C |
| D |
| E |
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What is the function of reverse transcriptase? (Activity 43B)
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| catalyzing the formation of a polypeptide from a RNA template |
| catalyzing the formation of DNA from a polypeptide template |
| catalyzing the formation of RNA from a polypeptide template |
| catalyzing the formation of RNA from a DNA template |
| catalyzing the formation of DNA from a RNA template |
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What is the source of a viral envelope? (Activity 43B)
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| host cell DNA |
| prophages |
| provirus |
| host cell membrane |
| viral glycoproteins |
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Which of these is reverse transcriptase? (Activity 43B) 
|
| A |
| B |
| C |
| D |
| E |
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Which of these is the viral genome? (Activity 43B) 
|
| A |
| B |
| C |
| D |
| E |
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Click on the diagram to start the animation. What enzyme is responsible for the process seen here? (Activity 43B)
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| RNA polymerase |
| DNA polymerase |
| reverse transcriptase |
| endonuclease |
| DNA ligase |
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Double-stranded viral DNA is incorporated into a host cell as a _____. (Activity 43B)
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| promoter |
| provirus |
| transposon |
| lac |
| homeoboxes |
