jspicouise assesshent id 46499 18lcourse id- 45919 1&content; id- 11293 QUESTION

Question

jspicouise assesshent id 46499 18lcourse id- 45919 1&content; id- 11293 QUESTION 7 Which of the following in not characteristic of exotoxins? O a they can be destroyed by boiling Ob. they can form toxiods c, they are proteins o d they are produced mainly by Gram gegative bacteria O e they are synthesized inside the cell QUESTION 8 A difference between a Type II and a Type lll secretion system is that Oa Type Il delivery systems are related to fagelar genes but Type ll systems are not o b toxins made by Type Il secretion systems are released into the surrounding environment while toxins made by Type ill secretion systems are released directly into a host cell OC toxin release by Type ll secretion systems are triggered by cell-cell contact while Type Ill systems are not o d. toxins made by Type Il secretion systems typically cause rearrangement of host cytoskeleton networks while toxins made by Type Ill secretion systems typically prevent lysosome-endosome fusion e toxins made by Type ll secretion systems affect intestinal cells only while toxins made by Type Il secretion systems affect cells of all types QUESTION 9

Explanation / Answer

7. Answer is d because exotoxins are mainly produced by gram positive bacteria.

Exotoxins are secreted by gram positive bacteria that are secreted outside cells. As these are protein molecules they can be converted to toxoid by heat or formaldehyde treatment. They are easily destroyed by boiling.

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