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What else can I help you with?
How do you charge the black spider helicopter?
Install batteries in the charging case (with adult supervision), and plug the small cable in the side of the copter. Turn the switch on the case on. The switch should be flashing red. When charging is complete, it will flash green. NOTE: charging takes awhile. About 30 minutes to an hour from my knowledge
What are some inherited behaviors of lions?
How it acts
Which organ acts likes a blender?
Your stomach
What does the word snarl suggest?
How a wild animal acts
What is the end of a cows tail called?
The switch.
Why lac operon the gene expression is switch off?
explain the regulation of gene expression in lac operon.
What are the roles of allolactose in the lac operon and tryptophan in trp operon?
allolactose acts as an inducer
What turns the lac operon off and off?
Repressors
What molecule causes transcription of an operon?
The molecule that typically causes transcription of an operon is an inducer, which can either activate or repress the operon by binding to a regulatory protein. In the case of an inducible operon like the lac operon in E. coli, lactose acts as an inducer by binding to the repressor protein and preventing it from blocking transcription.
The lac operon is shut off when what is absent?
The lac operon is shut off when lactose is absent. In the absence of lactose, the repressor protein binds to the operator site, preventing transcription of the lac operon genes.
Does a transistor in cut-off region acts as an open switch?
No
What turns the lac operon on and off?
The lac operon is turned on when lactose is present in the environment and glucose is scarce. This leads to the activation of the lac repressor protein, allowing the expression of genes involved in lactose metabolism. The lac operon is turned off when lactose is absent or glucose is abundant, which prevents the unnecessary expression of these genes.
What is a repressible operon?
A repressible operon is a type of operon in bacteria where gene expression is usually active but can be turned off when a specific corepressor molecule binds to the repressor protein. This binding causes the repressor to bind to the operator region of the operon, blocking transcription and thus shutting down gene expression. An example of a repressible operon is the trp operon in E. coli, which is involved in tryptophan biosynthesis.
Why is the tryptophan operon turned off in the presence of tryptophan?
The tryptophan operon is turned off in the presence of tryptophan because tryptophan acts as a corepressor. When tryptophan levels are high, it binds to the trp repressor protein. This trp-repressor complex then binds to the operator region of the operon, preventing RNA polymerase from transcribing the genes involved in tryptophan synthesis.
True are false the lac operon is a repressible operon?
False. The lac operon is an inducible operon, not a repressible one. It is typically turned off when lactose is absent and activated when lactose is present, allowing the transcription of genes needed for lactose metabolism. In contrast, repressible operons are usually active and can be turned off by the presence of a specific molecule.
When operated in cut off and saturation mode the transistor acts like what?
switch
What acts as a co-repressor to block transcription of the tryptophan operon?
The corepressor tryptophan itself binds to the repressor protein, causing a conformational change that allows it to bind to the operator sequence of the tryptophan operon. This blocks RNA polymerase from transcribing the operon, leading to repression of tryptophan biosynthesis.
