Cytotoxic T-Cell Activity against Target Cells

Cytotoxic T-cells produce _______ which creates holes in the cell membranes of target cells. A) antibody B) perforin C) cytokinin D) lysozyme E) complement

B) perforin

Infected cells A) display peptide fragments of degraded viral proteins on their cell surface B) have class II MHC antigens on their cell surface C) are not affected by T cells D) lyse T cells

A) display peptide fragments of degraded viral proteins on their cell surface

Cytotoxic T cells produce cytotoxins which cause apoptosis of infected cells. A) True B) False

A) true

Self proteins of infected cells are not recognized by cytotoxic T cells. A) True B) False

A) true

When a virus infects a cell, some of the viral proteins are broken down into peptide fragments. A) True B) False

A) true

Cytotoxic T-cells interact with Class II major histocompatibility complex (MHC) proteins. A) True B) False

B) false

Cytotoxic T-cells attack: A) viruses. B) bacteria. C) cells that display foreign proteins on their surface. D) cells that display normal proteins on their surface. E) both A and B

C) cells that display foreign proteins on their surface.

Cytotoxic T-cells interact with target cells by recognizing A) foreign proteins only. B) MHC proteins only. C) foreign protein-MHC protein complexes. D) either foreign proteins or MHC proteins. E) neither foreign proteins nor MHC proteins.

C) foreign protein-MHC protein complexes

Cytotoxic T cells recognize A) receptors on B cells B) fragments of self proteins of infected cells C) viral antigens and class I MHC D) viral antigens and class II MHC E) all of the above

C) viral antigens and class I MHC

Cytotoxic T cells produce: A) class II MHCs B) self proteins C) antibodies, which make holes in cell membrane of infected cells D) perforin, which makes holes in cell membrane of infected cells

D) perforin