Death Cap Mushrooms Produce a Substance Called Alpha-Amanitin

question 32

Multiple Choice

Death cap mushrooms produce a substance called alpha-amanitin. Alpha-amanitin efficiently blocks synthesis of mRNA, but not of tRNA or rRNA, in eukaryotic organisms. This is possible because alpha-amanitin efficiently interferes with ________.

• A) the action of RNA polymerase I, but not RNA polymerase II or III
• B) RNA polymerase III, but not RNA polymerase I and II
• C) the action of RNA polymerases I and II, but not RNA polymerase III
• D) the action of RNA polymerase II, but not RNA polymerase I or III

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