Multiple Choice
From which molecules are mRNA molecules transcribed?
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15. Gene Expression
Introduction to Transcription
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Why are promoter regions essential to RNA transcription?
A
They serve as the binding site for RNA polymerase to initiate transcription.
B
They are responsible for the termination of transcription.
C
They are the regions where DNA replication begins.
D
They encode the start codon for protein synthesis.
Verified step by step guidance1
Understand the role of promoter regions in the context of RNA transcription. Promoter regions are specific sequences of DNA that are crucial for initiating the process of transcription.
Recognize that RNA polymerase is the enzyme responsible for synthesizing RNA from a DNA template. It needs a specific site to bind to the DNA to start transcription.
Identify that the promoter region serves as the binding site for RNA polymerase. This is where the enzyme attaches to the DNA to begin transcribing the genetic information into RNA.
Clarify that promoter regions are not involved in the termination of transcription, DNA replication initiation, or encoding start codons for protein synthesis. Their primary function is to facilitate the binding of RNA polymerase.
Conclude that the essential function of promoter regions is to provide a starting point for RNA polymerase to initiate transcription, making them vital for the regulation and expression of genes.
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