Multiple Choice
Which of the following statements correctly describes gene regulation through RNA interference?
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16. Regulation of Expression
Introduction to Regulation of Gene Expression
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In the regulation of gene expression, where would you expect to find the promoter for a gene?
A
Upstream of the coding region
B
Downstream of the coding region
C
Within the coding region
D
In the intron region
Verified step by step guidance1
Understand the role of a promoter: A promoter is a DNA sequence that initiates the transcription of a particular gene. It is the binding site for RNA polymerase and transcription factors.
Identify the location of the promoter: The promoter is typically located upstream of the coding region of a gene. This means it is found before the start of the gene sequence that is transcribed into mRNA.
Consider the direction of transcription: Transcription proceeds in a 5' to 3' direction along the DNA strand. The promoter must be positioned such that it can guide the RNA polymerase to transcribe the gene in the correct direction.
Evaluate the other options: Downstream of the coding region would be after the gene, which would not allow for proper initiation of transcription. Within the coding region would disrupt the gene sequence. In the intron region would be within non-coding sequences, which is not typical for promoter placement.
Conclude the correct location: Based on the function and typical location of promoters, they are found upstream of the coding region, ensuring proper initiation and regulation of gene expression.
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