6.5 Operons

Operons are found in ___________ cells

Answer explanation

This type of gene regulation is simplified and only works for smaller genes

​ ​ (a)   are used for ​ (b)   to regulate which genes to express

• Operons
• prokaryotes
• Operators
• eukaryotes
• Regulatory genes

Operon

• A single gene controlled by multiple promoters.
• A type of protein that regulates gene expression.
• A sequence of DNA that codes for a single protein.
• Operon is a cluster of genes controlled by a single promoter to transcribe a single RNA.

Structual Genes

• Structural genes are segments of DNA that code for proteins.

• Structural genes are segments of RNA that code for lipids.
• Structural genes are non-coding regions of DNA.
• Structural genes are responsible for regulating gene expression.

Operator

• operators are locations of genes that are to be transcribed

• Operators are locations of a gene that RNA Polymerase binds to

• Operators are locations of a gene where the repressor protein binds

• Operators are the portion of a gene that codes for a regulatory protein

Promoter

• Promoters are the location of the gene that RNA Polymerase binds for transcription

• Promotors are a cluster of genes that transcribe a single RNA

• Promoters are the portion of the gene that code for a regulatory protein

• Promoters are supporessing proteins that connects to the operator.

Regulatory Gene

• Regulatory genes are the location of the gene that RNA polymerase binds to begin transcription

• Regulatory genes are the location of the gene that the repressor protein binds to turn the gene expression on or off

• Regulator proteins are the location of the genes that transcribe the structual genes.

• Regulatory genes are the portion of the DNA that codes for producing regulatory proteins.

Regulatory protein

• Regulatory proteins control gene expression by binding with the operator segement of the DNA to inhibit RNA Polymerase from transcription.

• Regulatory proteins are involved in energy production.
• Regulatory proteins are only found in bacteria.
• Regulatory proteins are solely responsible for cell division.

What best describes the Trp Operon?

• The Trp operon is an inducible operon that promotes tryptophan synthesis.
• The Trp operon is a structural gene that codes for enzymes unrelated to tryptophan.
• The Trp operon is a repressible operon that regulates tryptophan synthesis in response to its concentration.
• The Trp operon is a regulatory element that enhances transcription of all genes.

The environmental condtions that turn the trp operon on

• Presence of tryptophan
• High levels of glucose
• Increased temperature
• Absence of tryptophan