Multiple Choice
What determines which base is to be added to an RNA strand during transcription?
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15. Gene Expression
Introduction to Transcription
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the function of the promoter in a bacterial transcription unit?
A
It initiates the binding of RNA polymerase to start transcription.
B
It terminates transcription by releasing RNA polymerase.
C
It regulates the splicing of introns from pre-mRNA.
D
It codes for the synthesis of ribosomal RNA.
Verified step by step guidance1
Understand the role of a promoter in the context of transcription. A promoter is a DNA sequence that signals the start of transcription.
Recognize that the promoter is crucial for the initiation phase of transcription. It is the site where RNA polymerase binds to the DNA to begin synthesizing RNA.
Differentiate the promoter's function from other processes such as termination, splicing, and coding for ribosomal RNA. The promoter does not terminate transcription, regulate splicing, or code for ribosomal RNA.
Learn that in bacteria, the promoter is typically located upstream of the transcription start site and includes specific sequences like the -10 and -35 regions, which are recognized by RNA polymerase.
Conclude that the primary function of the promoter is to initiate the binding of RNA polymerase to the DNA, thereby starting the transcription process.
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