Discussion
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- Question
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)
- Correct Answer
- Both (a) and (b)
- 1. 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
- 2. 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
- 3. What information can be generated by interrupted mating experiments?
Options- A. Levels of DNA homology
- B. Bacterial genome maps
- C. DNA nucleotide sequences
- D. Proteomics of the bacteria Discuss
- 4. Which of the following transport bacterial DNA to other bacteria via bacteriophages?
Options- A. Conjugation
- B. Transduction
- C. Transformation
- D. Translation Discuss
- 5. In lysogeny,
Options- A. a bacteriophage transfers bacterial DNA
- B. bacteria take up double stranded DNA from the environment
- C. DNA-degrading enzymes in the extracellular medium would stop the process
- D. a bacteriophage genome is integrated into the bacterial genome Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Immune System problems
Search Results
Correct Answer: They are antigens found in some members of a species
Correct Answer: all of these
Correct Answer: Bacterial genome maps
Correct Answer: Transduction
Correct Answer: a bacteriophage genome is integrated into the bacterial genome
Correct Answer: A cytosolic protein
Correct Answer: All of these
Correct Answer: chromosome 6 in man, chromosome 17 in mice
Correct Answer: CD8
Correct Answer: all of the above
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