Transcription in eukaryotic cells which is resistant to α-amanitin is carried out by which RNA polymerase: RNA pol I only RNA pol II only RNA pol I and III RNA pol III only
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Transcription in eukaryotic cells which is resistant to α-amanitin is carried out by which RNA polymerase:
-
RNA pol I only
-
RNA pol II only
-
RNA pol I and III
-
RNA pol III only
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- The following events are those of RNA-directed RNA synthesis in Escherichia coli. Place the events in the correct sequence Recognition of the promoter region by the sigma subunit RNA polymerase binds to DNA The sigma subunit dissociates from the complex RNA polymerase catalyzes synthesis of RNA using the DNA as templateIf the following RNA polymerases were missing from a eukaryotic cell, what types of genes would not be transcribed? A. RNA polymerase I C. RNA polymerase III B. RNA polymerase IIThe process in which the two-dimensional structure of RNA from the L region of an operon can either prevent or allow transcription of the structural genes is called _____________. Group of answer choices Activation Co-repression Induction Attenuation Repression
- In eukaryotes, preinitiation complex is initiated by binding of the following factor to the promoter region of the protein-coding genes TFIID TFIIE and TFIIH RNA Polymerase Tata Binding ProteinsEukaryotic cells use which of the following to initiate transcription? a. Sigma proteins b. RNA polymerase II c. RNA polymerase III d. Basal transcription factorsTransfer RNA in eukaryotic cells is synthesized by which of the following enzymes (sensitive to high concentrations of the fungal poison a-amanitin, but not to low concentrations)? RNA polymerase I DNA polymerase I RNA polymerase II DNA polymerase II RNA polymerase III
- A bacterial operon consists of _____________________________________________ a single gene that can be spliced in different ways to produce different proteins. multiple genes, each transcribed by different promoters, which are regulated by different cis-acting factors. a single gene transcribed by multiple promoters to form a polycistronic mRNA. multiple genes transcribed from the same promoter to form a polycistronic mRNA. multiple transcription regulators affecting the same promoter.Why is a host-cell tRNA needed for reverse transcription?. In prokaryotes and eukaryotes, describe what else is happening to the RNA while RNA polymerase is synthesizing a transcript from the DNA template.
- The expression of eukaryotic genes can be regulated at the level of Choose one of the following transcription initiation. RNA splicing. translation. RNA stability. all of the aboveWhat are the effects of the following conditions on Lac operon of bacteria? Please do not forget to mention about the role of repressor, activator, RNA polymerase in each case. Glucose is absent and lactose is present Glucose is present and lactose is present Glucose is present and lactose is absentWhen cAMP binds to the Catabolite Activator Protein (CAP), it causes a conformational change on the protein, which results in binding to the CAP-binding site on the DNA and ___________________________ of the lac operon. This conformational change induced by the binding of another molecule is known as a(n) _________________________________. transcription repression; binding effect translation; distortion effect mutation; interactive effect attenuation; compression effect transcription activation; allosteric effect