A: It can repair the gap in the single-strand DNA.
B: It can replace DNA polymerase III to add dNTP into DNA chain when DNA template is damaged.
C: Using dNTP as substrate.
D: It possesses activity of 5’→3’ endonuclease.
举一反三
- Which<br/>of the following are NOT true about DNA polymerase I in E.coli:() A: It<br/>can repair the gap in the single-strand DN B: It<br/>can replace DNA polymerase III to add dNTP into DNA chain when DNA<br/>template is damaged. C: It<br/>possesses activity of 3’→5’ exonuclease. D: Using<br/>dNTP as substrate. E: It<br/>possesses activity of 5’→3’ endonuclease.
- The 5'→3' exonuclease activity of intact DNA polymerase I can replace a segment of DNA (or RNA) paired to the template strand, in a process known as ____________________.
- The correct statement about RNA polymerase and DNA polymerase is (1 point) A: Synthesis of polynucleotide chain using nucleoside diphosphate B: RNA polymerase requires primers and bases are added at the 5′-end of the extended polynucleotide chain C: DNA polymerase can only synthesize DNA using RNA as a template D: DNA polymerase can add nucleotides on both ends of a chain at the same time E: , DNA polymerase and RNA polymerase can catalyze the formation of 3',5'-phosphodiester bond
- The function of DNA polymerase I is to replace RNA primer with DNA. On which strand would you expect DNA polymerase I to be more active? A: the leading strand B: the lagging strand C: equally active on both strands D: neither , only DNA polymerase III is involved in synthesis
- 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.
内容
- 0
DNA polymerase III is the largest DNA polymerase in E. coli（）
- 1
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.
- 2
E coli DNA polymerase III: A: can initiate replication without a primer. B: is efficient at nick translation. C: is the principal DNA polymerase in chromosomal DNA replication. D: represents over 90% of the DNA polymerase activity in E: requires a free 5'-hydroxyl group as a primer.
- 3
Which of the following statements about DNA polymerase III is NOT true: A: Deoxyribonucleotide are connected to 5’ hydroxyl of synthesized DNA by DNA pol III B: Requires four kinds of 5’-dNTP C: To catalyze deoxyribonucleotide connected to 3’ terminal of RNA primer D: Pyrophosphate is one of the product
- 4
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