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Competitive Inhibition

Name the enzy...

Question

Name the enzyme that facilitates opening of DNA helix during transcription.

A

DNA polymerase

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B

RNA polymerase

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C

DNA ligase

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D

DNA helicase

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Solution

The correct option is B RNA polymerase
RNA polymerase holoenzyme binds to the promoter, unwinds DNA (open complex) and forms phosphodiester links between the initiating nucleotides.
DNA polymerase, DNA ligase & DNA helicase are involved in the process of replication and not transcription.

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Similar questions

Q. Name the enzyme that facilitates opening of DNA helix during DNA replication.

Q. Which of the following enzyme of transcription helps in opening of DNA helix as well as transcribing it?

Q. Read the following statements regarding transcription.
1. RNA polymerase initiates the process of transcription with the help of sigma factor.
2. RNA polymerase also facilitates opening of the DNA double helix in prokaryotes.
3. Transcription requires primer
4. In bacteria, there are three types of RNA polymerases.
How many of the above statements are incorrect?

Q. How many of the following statements are correct ?

A. DNA dependent DNA polymerase requires DNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription.

B. DNA dependent DNA polymerase requires RNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription.

C. During replication, unwinding of DNA double helix forms a fork-like structure called replication fork.

D. During transcription, unwinding of the DNA double helix by DNA dependent RNA polymerase forms a transcription bubble.

E. During transcription, unwinding of DNA double helix by DNA dependent RNA polymerase forms a transcription fork.

Q. The enzyme that reduces the tension during the unwinding of DNA helix in front of the replication folk is

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