RNA polymerases are more error-prone than DNA polymerases. Question 1 options: E

Question

RNA polymerases are more error-prone than DNA polymerases.

Question 1 options:

E. coli RNA polymerase requires which of the following for initiation in vivo?

Question 2 options:

A DNA primer.

An RNA primer.

Specific DNA sequences and interactions with regulatory proteins.

A single strand break.

What type of RNA encodes information for protein synthesis?

Question 3 options:

rRNA

intron lariats

tRNA

mRNA

The Lac operon is only controlled by the Lac repressor.

Question 4 options:

The functional Rho-independent transcription termination signal is a ____ present in the ____ .

Question 5 options:

hairpin and adjacent sequences, RNA

poly A track, RNA

termination codon, RNA

hairpin, DNA

Transcription and translation are coupled in eukaryotes.

Question 6 options:

When phosphorylated, the C-terminal domain of RNA polymerase II _____ .

Question 7 options:

is catalytically inactive

binds to transcriptional repressors

recruits histone deacetylases

enhances transcription elongation

A key step in repression of eukaryotic genes is deacetylation of histone tail ______ residues.

Question 8 options:

tyrosine

serine

lysine

threonine

Explanation / Answer

Ans 1 : True

RNA polymerases are almost as 10 times more prone to errors than the DNA polymerases. This is due to the reason that the RNA polymerase lack the ability to proof reading the sequence , whereas the DNA polymerase can proof read.

Due to this , there are higher chances of error in transcription process than the replication.

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