There are three RNA polymerases in eukaryotic cells, designated I, II, and I, an
ID: 276293 • Letter: T
Question
There are three RNA polymerases in eukaryotic cells, designated I, II, and I, and each performs a different function. They can be distiguished experimentally by their sensitivity to a-amanitin, a toxic peptide from the posionous mushroom Amanita phalloides. Identify the function and a-amanitin sensitivity of each RNA polymerase. RNA polymerase I RNA polymerase II RNA polymerase III Synthesizes pre-ribosomal RNA Synthesizes tRNA and small RNAs Not inhibited by a-amanitin. Inhibited by high concentrations Inhibited by low concentrations a-amanitin of ?-amanitin Synthesizes mRNAExplanation / Answer
Answere :
RNA Polymerase I : Synthesizes pre-ribosomal RNA, No inhibition by alpha-amanitin.
RNA Polymerase II : Synthesizes mRNA, Inihibited by low concentration of alpha-amanitin.
RNA Polymerase III : Synthesizes tRNA and small RNAs, Inhibited by high concentration of alpha-amanitin.