Question

QUESTION 7 Which of the following is the specific mode of action of diphtheria toxin and exotoxin A of Pseudomonas aeruginosa? ADPRibosylation of Gi Inactivation of elongation factor EF2 Inactivation of the 60S ribosomal subunit of the 80S ribosome ADPRibosylation of Gs Secretion of fluids and electrolytes QUESTION 8 Concerning protozoans and helminthes, which of the following is not true? Ingestion of the eggs of the pork tapeworm can cause systemic spread of larvae the brain. (cystercercosis) of the pathogen to of the gut and bile ducts with Enterobius vemicularis is the giant intestinal roundworm associated with obstruction "worm balls." Trichomonas is a protozoan responsible for vaginitis that generally is a STD. The practice of winding the "Guinea worm" on a stick for removal from cutaneous for the symbol (Caduceus) of the medical profession lesions was probably responsible Giardia is a common cause of water-borne outbreaks of diarrhea and Cryptosporidium caused a huge outbreak of water-borne diarrheas in Milwaukee involving about 2 million people and is a common cause of diarrhea in AIDS

Answer 1

Question 7:

Both diphtheria toxin (of Corynebacteria) and exotoxin A (of Pseudomonas aeruginosa) follow the same mechanism of action. They inactivate elongation factor EF2 via ADP-ribosylation thereby inhibiting translation (protein synthesis).

Other options are wrong because these toxins do not ADP-ribosylate Gi or Gs or inactivate 60S ribosome. They have no effect on fluids and electrolytes either.

Due to time constraint, I am unable to answer all the questions now. Please repost rest of the questions separately or mention “answer all the questions”. As per the Chegg guidelines, if a question has multiple questions in it, we can just answer the first question alone (due to time constraint) unless it is requested to answer all the questions.