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How is lac operon different from trp operon?
1. in lac operon; gene activity is induced when lactose is present in the medium, whereas in case of trp operon, repression of the gene activity takes place in presence of tryptophan in the medium. 2. lac operon spans about 4-6kb...whereas trp operon spans abut 7kb. 3. lac operon helps in the breakdown of lactose into glucose and galactose, to generate energy( catabolic pathway ) in case of trp operon, it helps in the synthesis of enzymes required for the formation of the amino acid Tryptophan( anabolic pathway ). 4. lac operon is an example of positive regulation ; and trp operon is an example of negative regulation. Trp operon is also regulated by other mechanism called attenuation while no such even occurs in lac operon . .
What are the roles of allolactose in the lac operon and tryptophan in trp operon?
allolactose acts as an inducer
What does tryptophan bind to when it is present in e. coli?
trp operon
In E. coli the tryprophan switches off the trp operon by?
Binding to the repressor and increasing the latter's affinity for the operator
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.
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.
If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon then will the amino acid act as a corepressor?
The enquiry unreservedly is contingent on on the discrete operon thus calliperating anonymous possessional theory inaccurate and subdued as despondent. The corepressor manicates specific ulterictic fallemins currupting a derreterial reaction. By Fan Club President
What proteins modulate the expression of genes?
well good examples of proteins regulating gene expression can be seen in most prokaryotic operons. Such as the trp operon or lac operon. These both contain sites upstream from the multiple cistrons, which code for repressor proteins (trpR and lacI - is says I but its still a repressor protein being produced). The trp operon is under negative repressible control which means transcription is turned of by the repressor binding to the operator gene (and also switched of by presence of an effector - in this case tryptophan). The same for the lac operon (except its under inducible negative control so is switched of until an effector is present - lactose). Also i the lac operon it is under positive control by the catabolite activator protein (CAP) - When glucose is in low levels the levels of CAMP (cyclic adenosine mono-phosphate) tend to be high. CAMP binds to CAP allowing CAP to bind to a region upstream from the Lac operons promoter (Approx 16 base pairs up). This assists in allowing RNA polymerase to bind to the DNA upregulating he gene expression for the cistrons downstream). In eukaryotes (I.e. us) however it is not a simple as a well organised length of DNA like the operons. They use a complex mix of control mechanisms. Such as enhancers, silencers etc.. The 2 types of regulation can be categorised into 2 groups: Cis- acting elements and trans -acting. Cis acting - these are regions of DNA that happen to be within the close proximity of the gene they wish to (excuse the anthropomorphism) regulate. These regions of DNA do not encode proteins but are acted on by trans-acting factors. Trans elements - these are genes which encode proteins, they are usually found quite some distance away from the target length of DNA for regulation. Probably a bit long winded, but its best to be thorough(ish) ;)
What is the function of the Trp operon?
TRP is Television Rating Point. The popularity of TV programmes are measured by the TRPs they receive. This is done with a system called the Peoples Meter is used to measure the audience. Peoples Meter is an gadget fixed to the TV to help identify the programme watched by the viewers of the household.The ratings for programmes are calculated by tracking the viewers for each minute and then it is averaged by the total duration of the programme.
How are the mutagenic compounds TRP 1 and TRP 2 formed?
TRP 1 and TRP 2 are not mutagenic compounds. They are enzymes involved in the synthesis of melanin, a pigment responsible for hair, skin, and eye color in humans.
Which is the best freeware converter of files format .trp?
I can' find freeware trp converterBros Trp Converter Mac , can help you to convert TRP files to any video format, such as, MP4, MOV, M4V, AVI, WMV, MPG, TS, 3GP, 3G2, VOB, ASF, MKV, SWF, FLV, DV, DPG, AMV, and MTV.Besides converting TRP files, it also supports converting between other popular video and audio files. What's more, it even supports extracting audio tracks from videos.
How do you convert trp file into avi file?
With trp converter software you can convert trp file into avi file. Not this but you can also convert trp into flv, mp4, asf, wmv, m4v, mov, mpg, etc. The software provides graphical user interface.
