In the context of gene expression, what is the function of a promoter?

In the context of gene expression, what is the function of a promoter?

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 these instructions into proteins.
Step 3: Learn that transcription is the first step in gene expression, where the DNA is copied into RNA.
Step 4: Identify the promoter as a specific region of DNA located at the beginning of a gene.
Step 5: Realize that the promoter acts like a 'start signal' for transcription.
Step 6: Understand that RNA polymerase is the enzyme that reads the DNA and makes RNA.
Step 7: Know that the promoter provides a binding site for RNA polymerase to attach and start transcription.

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