A: that is the opposite direction of the replication fork
B: that is the only way it can bind to DNA
C: that allows synthesis to resume easily if one base needs to be removed
D: this is the only direction permitted by the double helix
举一反三
- 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.
- Comparing<br/>DNA polymerase and RNA polymerase, the only differences is() A: The<br/>former has proof-reading activity, the latter doesn’t. B: The<br/>former requires primer, the latter doesn’t. C: The<br/>former can grow in both 5′→3′ and 3′→5′<br/>direction, the latter can only grow in 5′→3′. D: The<br/>former requires topoisomerase to relief stress, the latter doesn’t.
- 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 role of RNA primer during DNA replication is A: to guide DNA polymerase to bind with DNA template B: to provide 5’ phosphate end C: to provide attachment sites for four kinds of NTP D: to provide 3’-OH end to initiate synthesis of new DNA
- Water cannot resist(反抗) a pressure(压力) exerted on it in only one direction, the way, for example, a block of steel(钢块) can when it resists being squeezed(挤压) in a vise(台钳).
内容
- 0
What is the function of RNA primer during DNA replication? A: to provide a 3’ OH group for DNA polymerase B: to provide a 5’ OH group for DNA polymerase C: to provide a 3’ phosphate group for DNA polymerase D: to provide a 5’ phosphate group for DNA polymerase E: to provide a hydrogen bond for double strand of DNA .
- 1
The<br/>role of RNA primer during DNA replication is:() A: to<br/>guide DNA polymerase to bind with DNA template B: to<br/>provide 5’ phosphate end C: to<br/>provide attachment sites for four kinds of NTP D: inducing<br/>synthesis of RNA E: to<br/>provide 3’-OH end to initiate synthesis of new DNA
- 2
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
- 3
Which of the following statements are correct ( ) A: In eukaryotes, a gene can encode different proteins, but a mature mRNA chain encodes only one protein. B: The function of the promoter is affected by both the DNA sequence and its conformation. C: TFs help RNA polymerase recognize the promoter. D: In DNA biosynthesis, semi-reserved replication and semi-discontinuous replication refer to the same concept.
- 4
DNA replication requires: (1) DNA polymerase III, (2) helicase, (3) DNA polymerase I, (4) DNA-directed RNA polymerase, (5) DNA ligase, the correct order of their participation is: A: 2,3,4,1,5 B: 4,2,1,5,3 C: 4,2,1,3,5 D: 2,4,1,3,5