Antigens that bind directly to MHC proteins without any processing are known as _____. a. epitopes b. haptens c. superantigens d. naïve cells

Antigens that bind directly to MHC proteins without any processing
are known as _____.
a. epitopes
b. haptens
c. superantigens
d. naïve cells
by

1 Answer

Answer :

c. superantigens
by

Related questions

Acquired immunity usually involves protein receptors on B and T cells that recognize discrete regions of the antigen called _____. a. haptens b. epitopes c. antibodies d. protein receptors

Description : Acquired immunity usually involves protein receptors on B and T cells that recognize discrete regions of the antigen called _____. a. haptens b. epitopes c. antibodies d. protein receptors

Last Answer : b. epitopes

T cell receptors (or TCR) on CD4+ T cells A.recognize peptides not associated with MHC molecules B.recognize peptides associated with MHC class I molecules C.recognize peptides associated with MHC class II molecules D.are secreted out into the environment to bind antigens

Description : T cell receptors (or TCR) on CD4+ T cells A.recognize peptides not associated with MHC molecules  B.recognize peptides associated with MHC class I molecules  C.recognize peptides associated with MHC class II molecules  D.are secreted out into the environment to bind antigens

Last Answer : C.recognize peptides associated with MHC class II molecules

cell receptors (or TCR) on CD4+ T cells A-recognize peptides not associated with MHC molecules B- recognize peptides associated with MHC class I moleculesC- recognize peptides associated with MHC class II molecules D- are secreted out into the environment to bind antigens

Description : cell receptors (or TCR) on CD4+ T cells A-recognize peptides not associated with MHC molecules B- recognize peptides associated with MHC class I moleculesC- recognize peptides associated with MHC class II molecules D- are secreted out into the environment to bind antigens

Last Answer : recognize peptides associated with MHC class II molecules

The unique sets of proteins that present antigens on the surfaces of body cells are a. MHC proteins. b. Cytokines. c. Complement proteins. d. Immunoglobulins.

Description : The unique sets of proteins that present antigens on the surfaces of body cells are a. MHC proteins. b. Cytokines. c. Complement proteins. d. Immunoglobulins.

Last Answer : b. Cytokines.

Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? A- By rearrangements of the DNA encoding the variable regions of the heavy and light chains B- By the combination of different heavy and light chains that form the antigen binding siteC- Antibody proteins can physically change their shape to bind different epitopes D- Both (a) and (b)

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Passive artificial immunity occurs in the body when a/an _____ is injected into the body or when a developing fetus receives antibodies across the placenta. a. antibody-rich serum b. antigens c. haptens d. adjuvant

Description : Passive artificial immunity occurs in the body when a/an _____ is injected into the body or when a developing fetus receives antibodies across the placenta. a. antibody-rich serum b. antigens c. haptens d. adjuvant

Last Answer : a. antibody-rich serum

Which of the following is correct?A- All T Cells are CD4+ B- An epitope can have multiple antigens C- .T Cell receptors are generated by random assortment of gene cassettes D- .MHC Class II molecules are generated by random assortment of gene cassettes

Description : Which of the following is correct? A- All T Cells are CD4+ B- An epitope can have multiple antigens C- .T Cell receptors are generated by random assortment of gene cassettes D- .MHC Class II molecules are generated by random assortment of gene cassettes

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TH2 cells bind to a. MHC-11/peptide complex on APC cells. b. B cell receptors. c. MHc-1/etid complex on infected cells. d. MHC-11/peptide complex on B cells.

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Last Answer : d. MHC-11/peptide complex on B cells.

MHC Class II proteins, in conjunction with antigens, are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

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Last Answer : Answer : B

MHC class I proteins, in conjunction with antigens are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells

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Last Answer : Answer : A

T cells can recognise (A) Free antigens (B) Antigens bound to cells (C) Antigens bound to antibodies (D) Antigens bound to MHC proteins

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Last Answer : Answer : D

. MHC class I proteins would be found on___________ whereas MHC class II proteins would be found on_____________ a. Nucleated Cells; Plasma Cells b. Nucleated Cells; Macrophages c. Dendritic Cells; Neutrophils d. Only White Blood Cells; Red Blood Cells

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Last Answer : b. Nucleated Cells; Macrophages

Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells C- In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion

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Last Answer : CD8 T cells can kill individual virus-infected cells in a contact dependent fashion

Hyperimmune serum is serum with a higher than normal level of _____. a. antigens b. antibodies c. toxins d. immune cells

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All forms of immunity depend on an exposure to antigens and a subsequent response by _____ cells. a. basophil b. neutrophil c. NK d. T

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Last Answer : d. T

Antigens and haptens have the following similarity: (A) They have high molecular weights (B) They can elicit immune response by themselves (C) They can elicit an immune response only in association with some other large molecule (D) Once an immune response develops, free antigen and free hapten can be recognized by the antibody

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Last Answer : Answer : D

Haptens are: (1) Pseudoantigens (2) Incomplete antigens (3) Antibodies (4) Isoantigens

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Last Answer : Incomplete antigens

ALL the following are immunogenic except: a. Bacterial Flagella. b. Haptens. c. Bacterial Pili. d. Viral Spikes.

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The major histocompatibility complex of antigens may be found a. On the surface of body cells. b. Only on cells sensitized during allergy reactions. c. Only on cells involved in a xenograft. d. On cells stimulated by the urushiol in poison ivy plants.

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During the course of a cellular hypersensitivity a. Antibodies react with antigens in tissues. b. Serotonin and histamine are released by cells. c. Immune complexes form on blood vessel surfacesd. A skin thickening called an induration may form..

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Which of the following statements is false regarding B cells? A- B cells can undergo class switching and produce a different antibody type B- B one marrow stem cells migrate to the thymus and develop into B cells C- B cells synthesize antibodies and put them on their cell surface D- B cells that recognize high concentrations of antigens (self) in the absence of other signals

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MHC Class III proteins include (A) Immunoglobulins (B) Components of complement system (C) T cells receptors (D) CD4 and CD8 proteins

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MHC class II proteins are present on the surface of (A) All cells (B) B lymphocytes only (C) Macrophages only (D) Macrophages and B lymphocytes

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MHC class I proteins are present on the surface of (A) B cells only (B) T cells only (C) Macrophages only(D) All cells

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________ bind to_________ on microbial invaders. a. Toll-like receptors; PAM Ps b. Mast cells; histamine c. Toll-like receptors; complement d. Macrophages; defensins

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Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on A- chromosome 21 in man, chromosome 6 in mice B- chromosome 6 in man, chromosone 21 in mice C- chromosome 17in man, chromosome 6 in mice D- chromosome 6 in man, chromosome 17 in mice

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Last Answer : chromosome 6 in man, chromosome 17 in mice

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The formation of _____ by_____ directly lyses and kills pathogens. a. Membrane Attack Complexes, complement b. Inflammation, lymph nodes c. antibodies, plasma cells d. Plasma cells, B cells

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Which type of hypersensitivity reaction involves immune complexes formed when antigens bind to antibodies? a) Type III Type III hypersensitivity is associated with systemic lupus erythematosus, rheumatoid arthritis, serum sickness, certain types of nephritis, and some types of bacterial endocarditis.

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A high surface area to volume ratio in cells is important because it (a) Enables efficient transfer of wastes, nutrients and gases across the cell membrane (b) Prevents overproduction of cell proteins due to structural limitations (c) Allows many antigens on the surface for identification of self and non-self (d) Provides for better structural support to cope with external physical pressure

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Last Answer : Ans:(a)

The following are true : a. the HLA proteins are found within the cytoplasm of the cells b. HLA class I antigens are expressed on all cells with nuclei c. HLA class II antigens presents the virus infected cells to cytotoxic T lymphocytes d. HLA genes are found on chromosome 6 e. HLA tissue typing is carried out in all forms of transplantation to prevent rejection

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A hybridoma cell a. Secretes monoclonal antibodies. b. Presents antigens on its surface. c. Secretes polyclonal antibodies. d. Is an antigen-presenting cell

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When antigens are attached to the surface of latex beads and then reacted with an appropriate antibody, a/an reaction occurs. a. Inhibition b. Agglutination c. Neutralization d. Precipitation

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The serological reaction where antigens and antibodies form an extensive Lattice of large particles is called a. Fixation. b. Precipitation. c. Neutralization. d. Agglutination.

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An attenuated vaccine contains a. Inactive toxins. b. Living, but slow growing (replicating) antigens. c. Killed bacteria. d. Noninfective antigen subunits.

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Which one of the following is not an antigen? a. A toxin b. A virus c. A bacterial cell d. All (A-C) are antigens

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Weil-Felix reaction is based on sharing of antigens between A.sheep RBCs and EB virus B.mycoplasma and human O group RBCs C.rickettsial antigens and antigens of certain strains of Proteus D.none of these

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In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Description : In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

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In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Description : In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Last Answer : B.Antigens and antibodies are in optimal proportion

Which of the following is correct for isoantigens? A- They are antigens found in all members of different species B- They are antigens found in some members of a species C- They are antigens found in all members of a species D- They are antigens found in some members of different species

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An important step in protein synthesis is transcription. Which of the following statement(s) is/are true concerning this process? a. The first step in gene transcription involves separating the double helix of DNA by an enzyme known as DNA polymerase b. The initial product of DNA transcription is called heterogeneous nuclear RNA which codes directly for proteins c. After processing is complete, the mRNA is exported from the nucleus to the cytoplasm d. Only one protein can be produced from an initial mRNA strand

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MHC proteins are unique to (A) Each cell (B) Each organ (C) Each individual (D) Each species

Description : MHC proteins are unique to (A) Each cell (B) Each organ (C) Each individual (D) Each species

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are single-stranded DNA molecules that can recognize and bind to a distinctive nucLeotide sequence of a pathogen. a. Prophages b. Plasmids c. Cloning vectors d. DNA probes

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What is it called when an enzyme is blocked at its active site so the normal substrate can't bind? a. Competitive Inhibition b. Feedback Inhibition c. Noncompetitive Inhibition d. Pathway Modulation

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Proteins are chains of _____ that sometimes function as _____. a. monosaccharaides; energy compounds b. lipids; structural materials c. amino acids; enzymes d. disaccharides; enzymes

Description : Proteins are chains of _____ that sometimes function as _____. a. monosaccharaides; energy compounds b. lipids; structural materials c. amino acids; enzymes d. disaccharides; enzymes

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A disease in which the agent is acquired directly from the environment and is not transmissible is a/an _____ disease. a. Local b. Secondary c. Noncommunicable d. Acute

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Last Answer : b. Secondary

The role of the M cell is toA- .trap virus in mucus and prevent entry B- induce apoptosis in virus-infected small intestinal epithelia cells C- pass bacteria or virus to underlying macrophages for processing and presentation of antigen D- they use their cilia to propel mucus out of the small intestine

Description : The role of the M cell is to A- .trap virus in mucus and prevent entry B- induce apoptosis in virus-infected small intestinal epithelia cells C- pass bacteria or virus to underlying macrophages for ... and presentation of antigen D- they use their cilia to propel mucus out of the small intestine

Last Answer : pass bacteria or virus to underlying macrophages for processing and presentation of antigen

Reproduction in bacterial cells occurs by the sequence of events known as _____. a. mitosis b. binary fission c. selfing d. budding

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Cytotoxic T cells release which 2 toxic proteins as they fight target cells? a. histamine and heparin b. perforin and granzymes c. interleukin and interferon d. lysozymes and cytokines

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