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

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

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.

the answer is cell division : )