DNA polymerase and RNA polymerase, the only differences is()
A: The
former has proof-reading activity, the latter doesn’t.
B: The
former requires primer, the latter doesn’t.
C: The
former can grow in both 5′→3′ and 3′→5′
direction, the latter can only grow in 5′→3′.
D: The
former requires topoisomerase to relief stress, the latter doesn’t.
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
- DNA<br/>replication requires: (1) DNA polymerase III, (2) helicase, (3) DNA<br/>polymerase I,<br/>(4) DNA-directed RNA polymerase, (5) DNA ligase, the correct order of<br/>their participation is:() A: 4,3,1,2,5 B: 2,3,4,1,5 C: 4,2,1,5,3 D: 4,2,1,3,5 E: 2,4,1,3,5
- 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.
- Which<br/>of the following statements about DNA polymerase III is NOT true:() A: Deoxyribonucleotide<br/>are connected to 5’ hydroxyl of synthesized DNA by DNA pol III B: To<br/>catalyze deoxyribonucleotide connected to the primer C: Requires<br/>four kinds of 5’-dNTP D: To<br/>catalyze deoxyribonucleotide connected to 3’ terminal of RNA<br/>primer E: Pyrophosphate<br/>is one of the product
- Regarding the sample average and the population average, the following is correct ( ) A: Both are random variables B: Both are definite values C: The former is a certain value and the latter is a random variable D: The former is a random variable and the latter is a certain value
内容
- 0
The （） between successful and unsuccessful people is that the former put into practice what they have learned, while the latter don’t. A: link B: difference C: balance D: relationship
- 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
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.
- 3
An idiom differs from a free phrase in that the former is ___ and the latter is not.
- 4
In the complimentary close, which word should be capitalized? ______. A: Both B: Neither C: The former D: The latter