18 out of 97
Exotoxins are (DNB June 2009)
|A||Lipopolysaccharide in nature|
|B||Produced by gram negative bacilli|
|D||Very stable and resistant to chemical agents|
Ans. C Highly antigenic
a. Exotoxins are highly antigenic proteins secreted by gram positive or gram negative bacteria, are heat labile and sensitive to chemical agents, can be toxoided and exotoxins produced by different bacteria have variable action.