16, besides the repression/depression control of tryptophan operon, the second level of relat is known as attenuation. the presence of two tryphotophan codons w

16, Besides the repression/depression control of tryptophan operon, the second level of relat is known as attenuation. The presence of two tryphotophan codons within the tro contro this phenomenon. The presence of tryptophan-charged t RNAp Causes the premature temination of transcription, yields a 140 nucleotide long leader sequence transcript. By sita directed mutagenesis, the two UGC trp codons of the tp L sequence were modified to Coe arginine codon (arg). Which of the following amino acids would be able to restore the attenuation control of to operon? (a) Tryptophan alone (b) Arginine alone (c) Both (a) and (b) (d) Neither (b) nor (a) ic dofinod as