Question

Label this diagram of an operon.

   Label this diagram of an operon.

Biology

Sylvia S. Mader,… 12th Edition

Chapter 13, Problem 4

Instant Answer

Solved by Expert James Thierer

07/17/2019

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This strand has a double helix structure, which is characteristic of DNA. Therefore, we can label this as the DNA strand. Show more…

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Label this diagram of an operon.

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Key Concepts

Structural Genes

Structural genes are the genes within an operon that encode the proteins directly involved in cellular functions or metabolic processes. They are co-transcribed as a single mRNA, ensuring that their protein products are synthesized in a coordinated manner.

Regulatory Gene

A regulatory gene encodes a protein that modulates the expression of one or more operons by interacting with operator sequences. These genes are key components in the control of gene expression as they produce proteins that act as switches in response to environmental or cellular signals.

Repressor

A repressor is a protein produced by a regulatory gene that binds to the operator region, blocking the transcription machinery from accessing the promoter. This inhibition prevents the transcription of structural genes until specific signals deactivate the repressor.

Promoter

The promoter is a specific DNA sequence located upstream of the operon where RNA polymerase binds to initiate transcription. It plays a crucial role in determining when and how efficiently the operon is expressed.

Operon

An operon is a functional unit in prokaryotic DNA consisting of a cluster of genes transcribed together under the control of a single promoter and regulatory region. This arrangement allows coordinated expression of genes that typically participate in a related metabolic pathway or cellular process.

Operator

The operator is a regulatory DNA sequence situated near or overlapping the promoter. It serves as the binding site for regulatory proteins such as repressors, which can inhibit or modify the transcription of the operon by affecting the accessibility of the promoter.

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