RNA polymerase: ()
A: binds tightly to a region of DNA thousands of base pairs away from
the DNA to be transcribed.
B: can synthesize RNA chains without a primer.
C: has a subunit called λ (lambda), which acts as a proofreading
ribonuclease.
D: separates DNA strands throughout a long region of DNA (up to
thousands of base pairs), then copies one of them.
E: synthesizes RNA chains in the 3' →direction.
A: binds tightly to a region of DNA thousands of base pairs away from
the DNA to be transcribed.
B: can synthesize RNA chains without a primer.
C: has a subunit called λ (lambda), which acts as a proofreading
ribonuclease.
D: separates DNA strands throughout a long region of DNA (up to
thousands of base pairs), then copies one of them.
E: synthesizes RNA chains in the 3' →direction.
举一反三
- Which<br/>is correct about DNA polymerase and RNA polymerase:() A: RNA<br/>polymerases use nucleoside diphosphate instead of nucleoside<br/>triphosphate for synthesis of polynucleotide chains B: RNA<br/>polymerases need primer and add nucleotides in the 5 'end of the<br/>polynucleotide chain C: DNA<br/>polymerase can add nucleotides in both ends of the polynucleotide<br/>chain D: All<br/>of the RNA polymerases and DNA polymerases can only add nucleotides<br/>in the 3’ end of the polynucleotide chain
- Which of the following descriptions about DNA and RNA polymerase are correct: A: RNA polymerase synthesize RNA chain using nucleoside diphosphate instead of nucleoside triphosphates. B: RNA polymerase can initiate transcription without a primer, and nucleotides are added to 5’ end of the growing RNA chain. C: RNA polymerase can add nucleotides in both 3’ or 5’ end of RNA chain. D: Both RNA polymerase and DNA polymerase can only add nucleotides to 3’ end of the polynucleotides.
- In the following descriptions of DNA polymerase and RNA polymerase, the error is: ( ) A: RNA polymerase requires primers B: DNA polymerase can synthesize DNA using RNA as a template C: The extension direction of the new chain catalyzed by both enzymes is 5'-3'. D: RNA polymerase uses NDP as raw material.
- Which is correct about DNA polymerase and RNA polymerase: A: RNA polymerases use nucleoside diphosphate instead of nucleoside triphosphate for synthesis of polynucleotide chains B: RNA polymerases need primer and add nucleotides in the 5 'end of the polynucleotide chain C: DNA polymerase can add nucleotides in both ends of the polynucleotide chain D: All of the RNA polymerases and DNA polymerases can only add nucleotides in the 3’ end of the polynucleotide chain
- A virus with RNA-dependent RNA polymerase A: synthesizes DNA from an RNA template. B: synthesizes double-stranded RNA from an RNA template. C: synthesizes double-stranded RNA from a DNA template. D: transcribes mRNA from DN