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Asked by Emily Perez on May 25, 2024

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In an operon, the switch that controls mRNA synthesis is the promotor, which is a sequence of bases upstream from the first structural gene.

Operon

A functioning unit of genomic DNA containing a cluster of genes under the control of a single promoter, found in prokaryotes.

Promotor

A region of DNA that initiates transcription of a particular gene, providing a binding site for RNA polymerase and other transcription factors.

mRNA Synthesis

The process of synthesizing messenger RNA (mRNA) from a DNA template during gene expression, allowing for protein production.

  • Recognize and delineate the components responsible for starting and advancing transcription in eukaryotic cells.
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avaneet dhaliwalMay 28, 2024
Final Answer :
False
Explanation :
The switch that controls mRNA synthesis in an operon is the operator, not the promoter. The promoter is the site where RNA polymerase binds to initiate transcription, while the operator is the sequence that acts as the regulatory switch, often controlled by a repressor or activator protein.

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