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If the gene encoding the trp repressor is mutated such that it can no longer bind tryptophan, will transcription of the trp operon occur?
  • a)
    Yes, because the trp repressor can only bind the trp operon and block transcriptional initiation when it is bound to tryptophan
  • b)
    No, because this mutation does not affect the part of the repressor that can bind the operator (c) No, because the trp operon is repressed only when tryptophan levels are high
  • c)
    Yes, because the trp operon can allosterically regulate the enzymes needed to synthesize the amino acid tryptophan.
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
If the gene encoding the trp repressor is mutated such that it can no...
If the repressor can no longer bind tryptophan, then it cannot bind the operator and transcription of the trp operon will always be on, whether tryptophan levels in the cell are high or low.
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Community Answer
If the gene encoding the trp repressor is mutated such that it can no...

Explanation:

Impact of trp repressor mutation on transcription of trp operon:
- The trp repressor is a regulatory protein that binds to the trp operon in the presence of tryptophan, preventing transcription.
- If the gene encoding the trp repressor is mutated so that it can no longer bind tryptophan, the repressor will not be able to block transcription of the trp operon.
- As a result, transcription of the trp operon will occur even in the presence of tryptophan, leading to the synthesis of enzymes involved in tryptophan biosynthesis.

Significance of trp repressor binding to tryptophan:
- The trp repressor binds to tryptophan, causing a conformational change that enables it to bind to the operator region of the trp operon.
- When bound to the operator, the trp repressor blocks RNA polymerase from initiating transcription, thereby repressing the expression of the trp operon.

Conclusion:
- In conclusion, if the trp repressor is unable to bind tryptophan due to a mutation, it will not be able to block transcription of the trp operon, resulting in the constitutive expression of the operon even in the presence of tryptophan.
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If the gene encoding the trp repressor is mutated such that it can no longer bind tryptophan, will transcription of the trp operon occur?a)Yes, because the trp repressor can only bind the trp operon and block transcriptional initiation when it is bound to tryptophanb)No, because this mutation does not affect the part of the repressor that can bind the operator (c) No, because the trp operon is repressed only when tryptophan levels are highc)Yes, because the trp operon can allosterically regulate the enzymes needed to synthesize the amino acid tryptophan.Correct answer is option 'A'. Can you explain this answer?
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If the gene encoding the trp repressor is mutated such that it can no longer bind tryptophan, will transcription of the trp operon occur?a)Yes, because the trp repressor can only bind the trp operon and block transcriptional initiation when it is bound to tryptophanb)No, because this mutation does not affect the part of the repressor that can bind the operator (c) No, because the trp operon is repressed only when tryptophan levels are highc)Yes, because the trp operon can allosterically regulate the enzymes needed to synthesize the amino acid tryptophan.Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If the gene encoding the trp repressor is mutated such that it can no longer bind tryptophan, will transcription of the trp operon occur?a)Yes, because the trp repressor can only bind the trp operon and block transcriptional initiation when it is bound to tryptophanb)No, because this mutation does not affect the part of the repressor that can bind the operator (c) No, because the trp operon is repressed only when tryptophan levels are highc)Yes, because the trp operon can allosterically regulate the enzymes needed to synthesize the amino acid tryptophan.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the gene encoding the trp repressor is mutated such that it can no longer bind tryptophan, will transcription of the trp operon occur?a)Yes, because the trp repressor can only bind the trp operon and block transcriptional initiation when it is bound to tryptophanb)No, because this mutation does not affect the part of the repressor that can bind the operator (c) No, because the trp operon is repressed only when tryptophan levels are highc)Yes, because the trp operon can allosterically regulate the enzymes needed to synthesize the amino acid tryptophan.Correct answer is option 'A'. Can you explain this answer?.
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