Multiple Choice
During which stage of transcription do the following processes take place?
1. RNA polymerase binds to the promoter.
2. The RNA transcript is released.
3. The RNA transcript extended.
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15. Central Dogma & Gene Regulation
Steps of Transcription
Multiple Choice
What happens during the initiation step of DNA transcription?
A
The mRNA detaches from the RNA polymerase as the RNA polymerase leaves the DNA strand.
B
RNA polymerase attaches to the DNA at the promoter sequence of the gene.
C
A ribosome attaches to the initiation codon of a completed mRNA strand.
D
RNA polymerase moves along the template strand of the DNA creating an mRNA strand.
Verified step by step guidance1
Understand the concept of DNA transcription: DNA transcription is the process by which a segment of DNA is copied into RNA by the enzyme RNA polymerase.
Identify the initiation step: The initiation step is the first phase of transcription where RNA polymerase binds to the DNA at a specific region known as the promoter.
Recognize the role of the promoter: The promoter is a sequence of DNA that signals the RNA polymerase where to start transcribing the gene.
Explain the attachment of RNA polymerase: During initiation, RNA polymerase attaches to the promoter sequence, which is crucial for the transcription process to begin.
Clarify the incorrect options: The detachment of mRNA and the movement of RNA polymerase along the DNA are not part of the initiation step; these occur later in the transcription process.
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