1.

Which of the following enzymes catalyze the ADP-ribosylation of key cellular enzymes or proteins?(a) Diphteria toxin and cholera toxin(b) Dinitrogenase reductase(c) Protein phosphatases(d) Kinase

Answer» The correct choice is (a) Diphteria toxin and cholera toxin

To elaborate: The enzymes that catalyse the ADP-ribosylation and inactivation of key cellular enzymes or proteins are diphteria toxin and cholera toxin.


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