Question

QUESTION 1 Produced by species of Shigella and enterohemorrhagic Escherichia coli (EHEC) such as E. coli O157:H7, this is an AB toxin that cleaves host cell rRNA and prevents the attachment of charged tRNAs, thus stopping host cell protein synthesis. In rare cases, the toxin results in hemolytic uremic syndrome. Enterotoxin Botulism exotoxin Pertussis exotoxin Shiga toxin The "strong enough-to-vaporize-Oregon" toxin

Answer 1

In this case, the correct answer is Shiga Toxin. This toxin contains two subunits (A and B). The B subunit binds to specific glycolipids on the host cell while the A subunit will be internalized and then cleavage into two domains. A1 will be able to bind to the rRNA and inhibits protein synthesis.