trp operon $($Questions $3-6)$

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Predict the level of transcription of the trp operon genes in the presence of abundant tryptophan in a bacterial strain with a loss of function mutation in trpR $($trpR$-$ or trpR minus$).$

No transcription due to attenuation

A low level of transcription due to attenuation

A high level of transcription because the cell can no longer detect tryptophan levels

No transcription because the cell can no longer detect tryptophan

A high level of transcription due to attenuation

Question at position $4$

$4$

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Multiple Choice$$

$0\mathrm{.}5$ points$$

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Question at position $4$

Predict the level of transcription of the trpoperon genes in the presence of abundant tryptophan in a bacterial strain with a loss of function mutation in trpR$($trpR$-$or trpRminus$)$ and a complete deletion of the leader peptide sequences.

Predict the level of transcription of the trp operon genes in the presence of abundant tryptophan in a bacterial strain with a loss of function mutation in trpR $($trpR$-$ or trpR minus$)$ and a complete deletion of the leader peptide sequences.

A high level of transcription because the cell can no longer detect tryptophan levels

A high level of transcription due to attenuation

No transcription due to attenuation

A low level of transcription due to attenuation

No transcription because the cell can no longer detect tryptophan

Question at position $5$

$5$

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Multiple Choice$$

$0\mathrm{.}5$ points$$

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Question at position $5$

Predict the level of transcription of the trpoperon genes in the presence of abundant tryptophan in a bacterial strain with an in$-$frame deletion of the two$$trp$$codons that are usually found in the leader peptide sequences.

Predict the level of transcription of the trp operon genes in the presence of abundant tryptophan in a bacterial strain with an in$-$frame deletion of the two$$trp$$codons that are usually found in the leader peptide sequences.

A low level of transcription due to attenuation

No transcription because the cell can no longer detect tryptophan

No transcription due to attenuation

A high level of transcription because the cell can no longer detect tryptophan

A high level of transcription due to attenuation

Question at position $6$

$6$

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Multiple Choice$$

$0\mathrm{.}5$ points$$

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Question at position $6$

Predict the level of transcription of the trpoperon genes in the presence of abundant tryptophan in a bacterial strain with a mutation that changes the AUG encoding the start Methionine of the leader peptide sequences to CUG.

Predict the level of transcription of the trp operon genes in the presence of abundant tryptophan in a bacterial strain with a mutation that changes the AUG encoding the start Methionine of the leader peptide sequences to CUG.

No transcription because the cell can no longer detect tryptophan

A low level of transcription due to attenuation

A high level of transcription due to attenuation

A high level of transcription because the cell can no longer detect tryptophan

No transcription due to attenuation