Anti Bodies problems
- 1. Antibodies in the human immune system can identify approximately 108 different molecules Which one of the following is correct?
Options- A. This diversity is generated from 108 different immunoglobin genes
- B. Many of these molecules are self-antigens
- C. Most of these antibodies recognize proteins
- D. Most of these antibodies recognize small organic molecules Discuss
Correct Answer: Most of these antibodies recognize proteins
- 2. A polyclonal antibody response
Options- A. is produced only in response to polymeric antigens
- B. is produced by several B cells recognizing different pitopes on the same antigen
- C. occurs during the lag phase of the immune response
- D. violates clonal selection Discuss
Correct Answer: is produced by several B cells recognizing different pitopes on the same antigen
- 3. The immunoglobulin fold is
Options- A. found only in IgG molecules
- B. a ?-barrel composed of a three- and a four-stranded antiparallel ?-sheet
- C. both (a) and (b)
- D. found six times in the IgG molecule Discuss
Correct Answer: a ?-barrel composed of a three- and a four-stranded antiparallel ?-sheet
- 4. The main function of antibodies is to
Options- A. kill all the foreign bodies
- B. generate antigens, thus conferring immunization
- C. protect the circulatory system
- D. chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease Discuss
Correct Answer: chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease
- 5. IgE provides
Options- A. immunity against some parasites
- B. complement killings of the cells and phagocytosis
- C. secretions in the body
- D. all of the above Discuss
Correct Answer: immunity against some parasites
- 6. Alum is an effective adjuvant because it
Options- A. disaggregates the antigen.
- B. is immunogenic for stem cells
- C. is immunogenic for T cells
- D. slows the release of antigen Discuss
Correct Answer: is immunogenic for T cells
- 7. Antigenic determinants bind to which portions of an antibody?
Options- A. Variable regions
- B. Constant regions
- C. Only light chains
- D. Only heavy chains Discuss
Correct Answer: Variable regions
- 8. Structures of anti-PCP antibody shows that the tight binding of PCP to the antibody is primarily due to
Options- A. hydrophobic forces
- B. electrostatic forces.
- C. Van der Waals forces.
- D. none of these Discuss
Correct Answer: hydrophobic forces
- 9. Antibodies can be used
Options- A. for the localization of proteins in the cell
- B. for protein purification
- C. to catalyze chemical reactions
- D. all of the above Discuss
Correct Answer: all of the above
- 10. A secondary antibody is an antibody that
Options- A. has been used in prior experiments
- B. is synthetically produced
- C. binds to another antibody
- D. is produced in boostered animals Discuss
Correct Answer: binds to another antibody
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