DNA polymerase probably synthesizes in the 5'→3'direction because
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
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).