Differences between Exotoxins and Endotoxins
| A | Due to exotoxin | |
| B | Due to endotoxin | |
| C | Both of the above | |
| D | None of the above |
| A | Due to exotoxin | |
| B | Due to endotoxin | |
| C | Both of the above | |
| D | None of the above |
Due to exotoxin
Exotoxins are –
| A |
Lipopolysaccharide in nature |
|
| B |
Produced by gram –ye bacilli |
|
| C |
Highly antigenic |
|
| D |
Very stable and resistant to chemical agents |
Exotoxins are –
| A |
Lipopolysaccharide in nature |
|
| B |
Produced by gram –ye bacilli |
|
| C |
Highly antigenic |
|
| D |
Very stable and resistant to chemical agents |
Ans. is ‘c’ i.e., Highly antigenic
True about exotoxins –
| A |
Lipopolysaccharide |
|
| B |
Not antigenic |
|
| C |
Can be toxoided |
|
| D |
Heat stable |
True about exotoxins –
| A |
Lipopolysaccharide |
|
| B |
Not antigenic |
|
| C |
Can be toxoided |
|
| D |
Heat stable |
Ans. is ‘c’ i.e., Can be toxoided
- Exotoxins can be toxoided.
- Exotoxins are protein in nature, heat labile and has antigenic property.
Lipopolysaccharide structure is characteristic of –
| A |
Exotoxin |
|
| B |
Endotoxin |
|
| C |
Both |
|
| D |
None |
Lipopolysaccharide structure is characteristic of –
| A |
Exotoxin |
|
| B |
Endotoxin |
|
| C |
Both |
|
| D |
None |
Ans. is ‘b’ i.e., Endotoxin.
Toxoid is prepared from –
| A |
Exotoxin |
|
| B |
Endotoxin |
|
| C |
Both |
|
| D |
None |
Toxoid is prepared from –
| A |
Exotoxin |
|
| B |
Endotoxin |
|
| C |
Both |
|
| D |
None |
Ans. is ‘a’ i.e., Exotoxin
Toxoids
o Certain organisms produce exotoxins e.g., diphtheria and tetanus bacilli.
o The toxin produced by these organisms are detoxicated and used in the preparation of vaccines.
o The antibodies produced neutralize the toxic moiety produced during infection, rather than act upon the organisms.
Which of the following is an exotoxin:
NIMHANS 07
| A |
E. coli toxin |
|
| B |
Proteus |
|
| C |
Pseudomonas |
|
| D |
Tetanus toxin |
Which of the following is an exotoxin:
NIMHANS 07
| A |
E. coli toxin |
|
| B |
Proteus |
|
| C |
Pseudomonas |
|
| D |
Tetanus toxin |
Ans. Tetanus toxin
True about endotoxin ‑
| A |
Protein |
|
| B |
Highly antigenic |
|
| C |
No enzymatic activity |
|
| D |
Produced by gram positive bacteria |
True about endotoxin ‑
| A |
Protein |
|
| B |
Highly antigenic |
|
| C |
No enzymatic activity |
|
| D |
Produced by gram positive bacteria |
Ans. is ‘c’ i.e., No enzymatic activity
True about exotoxin ‑
| A |
Non-antigenic |
|
| B |
Enzymatic |
|
| C |
Non-protein |
|
| D |
Heat stable |
True about exotoxin ‑
| A |
Non-antigenic |
|
| B |
Enzymatic |
|
| C |
Non-protein |
|
| D |
Heat stable |
Ans. is ‘b’ i.e., Enzymatic
All are true except ‑
| A |
Exotoxin has enzymatic action |
|
| B |
Endotoxin has enzymatic action |
|
| C |
Exotoxin is highly antigenic |
|
| D |
Endotoxin is weakly antigenic |
All are true except ‑
| A |
Exotoxin has enzymatic action |
|
| B |
Endotoxin has enzymatic action |
|
| C |
Exotoxin is highly antigenic |
|
| D |
Endotoxin is weakly antigenic |
Ans. is ‘b’ i.e., Endotoxin has enzymatic action
