1. Is thelacoperon a repressible or an inducible operon? What happens in the absence of lactose?...

1. Is thelacoperon a repressible or an inducible operon? What happens in the absence of lactose? What happens in the presence of lactose? Is the trp operon a repressible or an inducible operon? What happens in the absence of tryptophan? What happens in the presence of tryptophan?

Expert Solution

Lactose Operon is an inducible type of Operon.

Under normal conditions, when glucose is present and lactose is absent, the Operon is bound by repressor at operator and this prevents RNA polymerase from transcribing the Operon. In this case Operon is in switched off condition.

But when lactose is present in the medium, it acts as inducer and binds to repressor thereby degrading it. This makes operator free of repressor and now RNA polymerase can transcribe the Operon. In this case, the operon is in switched on condition.

Tryptophan Operon is a repressible type of Operon.

In normal condition, when tryptophan is absent, then the coupon is in switched on condition.

But whenever tryptophan is present in the medium, then tryptophan binds to the tryptophan repressor thereby activating it and making it bind to operator. Now the Operon cannot transcribe. This makes the Operon in a switched off condition.

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gladiator answered 1 year ago

Is the lac operon a repressible or an inducible operon? What happens in the absence of...

Is the lac operon a repressible or an inducible operon? What happens in the absence of lactose? What happens in the presence of lactose? Is the trp operon a repressible or an inducible operon? What happens in the absence of tryptophan? What happens in the presence of tryptophan?

Is the lac operon a repressible or an inducible operon? What happens in the absence of...

Is the lac operon a repressible or an inducible operon? What happens in the absence of lactose? What happens in the presence of lactose? Is the trp operon a repressible or an inducible operon? What happens in the absence of tryptophan? What happens in the presence of tryptophan?

Describe the difference between a repressible operon and an inducible operon. Give an example of either...

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In the absence of trp, what happens to the genes within the trp operon? 1. regulator...

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3. Explain what happens to the Lac operon when lactose is present and glucose is also...

3. Explain what happens to the Lac operon when lactose is present and glucose is also present. Then explain what happens when lactose is present but glucose is absent. In your answer, include all of the components of the Lac operon and the molecules involved in its regulation. What is the protein product of the Lac operon? Explain why this mechanism of control is adaptive.

Thinking of lactose operon regulation, what happens when E. coli is grown in medium with glucose...

Thinking of lactose operon regulation, what happens when E. coli is grown in medium with glucose and lactose? Group of answer choices neither Cap/cAMP activator nor LacI repressor are bound to a regulatory DNA sequence. LacI repressor is bound to the OPERATOR sequence but Cap/cAMPactivator is not. Cap/cAMP activator is bound to the CAP motif but LacI repressor is not. both Cap/cAMP activator and LacI repressor are bound to the OPERATOR sequence.

Question

1. Is thelacoperon a repressible or an inducible operon? What happens in the absence of lactose?...

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Expert Solution

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