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What is the role of the promoter in gene expression?
What is the role of the promoter in gene expression?
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Practice Questions
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What is the role of the promoter in gene expression?
To terminate transcription
To enhance translation
To initiate transcription
To splice RNA
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The promoter is a DNA sequence that initiates transcription by providing a binding site for RNA polymerase.
Questions & Step-by-step Solutions
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Q
Q: What is the role of the promoter in gene expression?
Solution:
The promoter is a DNA sequence that initiates transcription by providing a binding site for RNA polymerase.
Steps: 7
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Step 1: Understand that genes are segments of DNA that contain instructions for making proteins.
Step 2: Know that gene expression is the process of turning on a gene to produce its corresponding protein.
Step 3: Identify the promoter as a specific region of DNA located at the beginning of a gene.
Step 4: Realize that the promoter acts like a 'start signal' for the gene.
Step 5: Learn that RNA polymerase is an enzyme that reads the DNA and helps make RNA from the gene.
Step 6: Understand that the promoter provides a binding site for RNA polymerase, allowing it to attach and start the process of transcription.
Step 7: Conclude that without the promoter, RNA polymerase would not know where to start, and the gene would not be expressed.
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