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What is the determining factor for the transcription of structural genes of the trp operon?
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Where on the lac operon does transcription take place?
The lac operon encodes enzymes required in the digestion and transport of lactose. Transcription is activated when there is lactose in the cellular environment, and RNA polymerase binds to the promoter region of the operon, and activates the expression of lacA, lacZ and lacY.
What information is coded by the structural gene of the operon?
proteins
What is a repressible operon?
is one that is usually on; binding of a repressor to the operator shuts off transcription
How prokaryotes control gene expression?
The operon often controls the transcription of prokaryote genes.
What is promoters and an operator together called?
Operon. It contains the promoter, operator, and the structural gene.
Transcription of the structural genes in an inducible operon?
starts when the pathway's substrate is present
What does the promoter of the lac operon sac do?
The promoter region of the lac operon is where the RNA polymerase begins to bind for the transcription of the structural gene Y and Z
An operon is composed of?
An operon is a group of genes that operate together.Operon- a functioning unit of genomic DNA containing a cluster of genes under the control of a single regulatory signal or promoter.Operons are clusters of genes consisting of one operator and promoter. There are a lac operon, which is responsible for metabolism of glucose. And there is also the Trp operon, which is responsible for synthesising tryptophan.
What molecule causes transcription of an operon?
An inducer
What controls the transcription of prokaryotic genes?
The operon often controls the transcription of prokaryote genes.
How does the repressor protien prevent transcription?
it blocks the promoter from the operon.
What are the three components of an operon and there roles?
Holy crud, are you in AP Biology too?Anyway... take the trp operon, for instance. Its components are...Five Structural Genes:These genes contain the genetic code for the five enzymes in the Trp synthesis pathwayOne Promoter:DNA segment where RNA polymerase binds and starts transcriptionOne Operator:DNA segment found between the promoter and structural genes. It determines if transcription will take place. If the operator is turned "on", transcription will occur.
Where on the lac operon does transcription take place?
The lac operon encodes enzymes required in the digestion and transport of lactose. Transcription is activated when there is lactose in the cellular environment, and RNA polymerase binds to the promoter region of the operon, and activates the expression of lacA, lacZ and lacY.
What acts as a co-repressor to block transcription of the tryptophan operon?
Tryptophan
What information is coded by the structural gene of the operon?
proteins
What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?
It would result in the continuous transcription of the operon's genes.
What is a set of genes whose transcription is regulated by an operator gene is called?
Operon
