Which of the following mutations of the trpL region would be least likely to affect attenuation of trp operon transcription?

a) a deletion of region 4

b) a deletion of the uracil nucleotides immediately following region 4

c) a deletion of the start (AUG) codon of the trpL polypeptide

d) an insertion of two nucleotides immediately after the polypeptide stop codon

e) an insertion of two nucleotides immediately following the polypeptide start codon

Question

Biology

Carlos Dunn

6 June, 20:55

Which of the following mutations of the trpL region would be least likely to affect attenuation of trp operon transcription?

a) a deletion of region 4

b) a deletion of the uracil nucleotides immediately following region 4

c) a deletion of the start (AUG) codon of the trpL polypeptide

d) an insertion of two nucleotides immediately after the polypeptide stop codon

e) an insertion of two nucleotides immediately following the polypeptide start codon

+1

Answers (1)

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Donna · Answer 1

Answer: C

Explanation:

For example, in trp-operon, an abundance of tryptophan. coli inhibits the expression trp-operon genes.

Trp operon is a negative repressible feedback mechanism

trpR gene is expressed continually at a low level