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Operons appear most in prokaryotes, however can also be found in some eukaryotic organisms such as the nematode. The nature of this is because operons produce polycistronic mRNA, which is used mostly by bacteria, whereas eukaryotes use monocistronic mRNA.
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What is the role of operons in prokaryotic organisms?
An operon is a series of genes that code for specific products and the regulatory elements that control operator DNA segments.
Are hox genes regulated by operons?
No
Difference between inducible and repressible operons?
The differences between these two types of operons are significant. In the repressible operon, The product is the regulatory metabolite and starts in the "on" position allowing RNA primase to unzip mRNA. Also the repressor protein only bings to the operator gene in the presence of the regulatory metablite. In the inducible operon, The reactact is the regulartory metabolite and starts in the off position blockig the primase from unzipping mRNA. The repressor protein only binds to the operator gene in the absence of the regulatory metabolite.
Proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called?
Activators
Are operons found in eukaryotes?
"False. (I found the answer in my Biology textbook)" Not true. An operon is technically more than one gene sequence that is controlled by a repressor or signal. Recent research into eukaryotic genes, especially those in protists and chordates, have revealed that eukaryotes also have operons, though they are slightly different in complexity to the ones found in prokaryotes, giving rise to the conclusion that operons are more common than expected.
2 types of operons?
The two types of operons are Inducible and Repressible Operons.
What is the role of operons in prokaryotic organisms?
An operon is a series of genes that code for specific products and the regulatory elements that control operator DNA segments.
Are hox genes regulated by operons?
No
How mutant organism assist scientists in understanding how normal physiological processes take place?
understanding of how operons are controlled was achieved by the "knockout" mutants- that each lacked one of the genes in the operons and its regulatory region.
Eukaryotic DNA sequences called enhancers have a function similar to the of prokaryotic operons?
Eukaryotic DNA sequences called enhancers have a function similar to the operators of prokaryotic operons. In eukaryotic cells, repressor proteins inhibit transcription by binding to silencers.
Difference between inducible and repressible operons?
The differences between these two types of operons are significant. In the repressible operon, The product is the regulatory metabolite and starts in the "on" position allowing RNA primase to unzip mRNA. Also the repressor protein only bings to the operator gene in the presence of the regulatory metablite. In the inducible operon, The reactact is the regulartory metabolite and starts in the off position blockig the primase from unzipping mRNA. The repressor protein only binds to the operator gene in the absence of the regulatory metabolite.
Do mitochondria have introns?
No, prokaryotes do not have introns, and therefore do not do RNA processing. However, eukaryotes do.
Proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called?
Activators
What is a set of prokaryotic genes that are regulated and transcribed as a unit?
They are operons. The genes contained in an operon are expressed together or not at all.
Proeteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called?
inducer
Are operons found in eukaryotes?
"False. (I found the answer in my Biology textbook)" Not true. An operon is technically more than one gene sequence that is controlled by a repressor or signal. Recent research into eukaryotic genes, especially those in protists and chordates, have revealed that eukaryotes also have operons, though they are slightly different in complexity to the ones found in prokaryotes, giving rise to the conclusion that operons are more common than expected.
What are the proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter called?
transcription factor
