How would mutations that inactivate each of the following genes a...

Question

How would mutations that inactivate each of the following genes affect the determination of the lytic or lysogenic life cycle in mutated λ phage strains? Explain your answers.cro

Accepted Answer

Hey, everyone. Let's take a look at this question together. During the early stages of infection, the phage hijacks the host machinery to produce its own components and replicate its genome. Which of the following proteins plays a key role in repressing the expression of the C L gene in inhibiting its transcription. Is it answer choice. A repressor protein, answer choice B integrase protein, answer choice C C R O protein or answer choice D lysozyme protein. Let's work this problem out together to try to figure out which of the following proteins plays that role in repressing expression of the C L gene. So we are talking about the repression of the C L gene, which we know that repression of the C L gene is caused by that inhibition of the transcription of the C L G since the C L protein is responsible for the expression of the C L gene. And so the inhibition of the transcription of the C L gene results in that repression of the C L gene. And the inhibition of the transcription occurs because the age when it hijacks that host machinery to produce its own components and replicate its genome expresses C R O protein, which the C R O protein binds 20 R three and O R two. And so, the cro protein binding to O R three and O R two results in that repression of the C L gene. And so the protein which plays a key role in repressing the expression of the C L gene and inhibiting its inscription is C R O protein. So, answer choice, C C R O protein is the correct answer. Since the phage expresses that C R O protein which binds to the operators O R three and O R two, inhibiting the transcription of the C L gene. Since the binding of the C L G means that the lambda repressor protein, you find it. And so that is why the phage expresses that C R O protein to bind to O R three and O R two and cause that repression of the C L gene. I hope you found this video to be helpful. Thank you and goodbye.

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How would mutations that inactivate each of the following genes affect the determination of the lytic or lysogenic life cycle in mutated λ phage strains? Explain your answers.cro

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