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Which of the following events occur when E. coli is straved for tryptophan ?
  • a)
    The ribosome translates the leader peptide completely
  • b)
    Transcription reads through attenuator into trp EDCBA
  • c)
    Tryptophanyl tRNA is not formed
  • d)
    A stem loop structure involving regions 3 and 4 is formed at attenuator site.
Correct answer is option 'B,C'. Can you explain this answer?
Related Test: Molecular Biology MCQ 1

IIT JAM Question

REETA JAIN
May 15, 2020
In the absence of tryptophan, the ribosomes would stall at trp codons in the leader sequence present in region1. This allows region 2 and 3 to pair and from an anti-termination loop, which allows transcription to continue into trp EDCBA genes, which code the enzymes for tryptophan synthesis. Since tryptophan is not present, so tryptophanyl- tRNA would not be formed, hence options b and c are  correct.

This discussion on Which of the following events occur when E. coli is straved for tryptophan ?a)The ribosome translates the leader peptide completelyb)Transcription reads through attenuator into trp EDCBAc)Tryptophanyl tRNA is not formedd)A stem loop structure involving regions 3 and 4 is formed at attenuator site.Correct answer is option 'B,C'. Can you explain this answer? is done on EduRev Study Group by IIT JAM Students. The Questions and Answers of Which of the following events occur when E. coli is straved for tryptophan ?a)The ribosome translates the leader peptide completelyb)Transcription reads through attenuator into trp EDCBAc)Tryptophanyl tRNA is not formedd)A stem loop structure involving regions 3 and 4 is formed at attenuator site.Correct answer is option 'B,C'. Can you explain this answer? are solved by group of students and teacher of IIT JAM, which is also the largest student community of IIT JAM. If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for IIT JAM on EduRev and even discuss your questions like Which of the following events occur when E. coli is straved for tryptophan ?a)The ribosome translates the leader peptide completelyb)Transcription reads through attenuator into trp EDCBAc)Tryptophanyl tRNA is not formedd)A stem loop structure involving regions 3 and 4 is formed at attenuator site.Correct answer is option 'B,C'. Can you explain this answer? over here on EduRev! Apart from being the largest IIT JAM community, EduRev has the largest solved Question bank for IIT JAM.

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