Immune System problems
- 1. Natural killer cells are involved in
Options- A. tumour rejection
- B. allograft rejection
- C. non-specific killing of virus transformed target cells
- D. all of these Discuss
Correct Answer: all of these
- 2. Which of the following is correct for isoantigens?
Options- 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 Discuss
Correct Answer: They are antigens found in some members of a species
- 3. Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated?
Options- 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 site
- C. Antibody proteins can physically change their shape to bind different epitopes
- D. Both (a) and (b) Discuss
Correct Answer: Both (a) and (b)
- 4. Which of the following proteins would not need localization signal?
Options- A. A nuclear protein
- B. A cytosolic protein
- C. A protein bound to the endoplasmic reticulum (ER) membrane
- D. A cell surface protein Discuss
Correct Answer: A cytosolic protein
- 5. Which of the following(s) is/are the determinants of antigenicity?
Options- A. Chemical nature
- B. Size of the antigen
- C. Foreignness
- D. All of these Discuss
Correct Answer: All of these
- 6. Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on
Options- 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 Discuss
Correct Answer: chromosome 6 in man, chromosome 17 in mice
- 7. Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is
Options- A. actin
- B. interleukin
- C. HLA
- D. CD8 Discuss
Correct Answer: CD8
- 8. Polymorphonuclear leukocytes (or PMNs)
Options- A. can be attracted to the site of an infection following activation of complement
- B. are derived from bone marrow stem cells
- C. are a type of phagocyte that can engulf and kill bacteria
- D. all of the above Discuss
Correct Answer: all of the above
- 9. Which of the following expresses CD3 surface antigen?
Options- A. Granulocytes
- B. T cells
- C. Monocytes
- D. B cells Discuss
Correct Answer: T cells
- 10. CD8 surface antigen is present in
Options- A. cytotoxic T cells
- B. suppresssor T cells
- C. both (a) and (b)
- D. none of these Discuss
Correct Answer: both (a) and (b)
More in Microbiology:
Programming
Copyright ©CuriousTab. All rights reserved.