A bacterial strain called XYZ living in the lakeMBG223 requires to synthesize tryptophan continuously. The reasonis, the essential proteins (essential means, the proteins requiredfor survival of the bacteria) contain high content of tryptophan.Therefore, this bacterial strain XYZ has atryptophan operon. Unfortunately, the tryptophan level of nutritionavailable in lake MBG223 is very limited during summer and wintertime and the other nutrition levels are high. During the summertime, as the lake MBG223 partially evaporates, the salinity of thewater increases, the temperature of the lake arises and the pH ofthe environment turns from natural to acidic. Changes in salinity,pH and temperature is known to disrupt hydrogen bonding innucleotide base-pairings and also the structure of the proteins.Here, assuming that the structure/function of the proteins are noteffected please answer the following.
Ä°nside the XYZ bacteria, what would you observe withregards to synthesis of tryptophan bearing proteins during summervs. winter time? How would this effect bacterial growth rate duringthe summer time vs winter time?
2) In another neighboring lake called MBG222, theyfound a different bacterial strain called WOWWW to have mutanttRNAs on the anti-codon region of the tRNA. This tRNA carriesPhenylalanine to wherever it encounters the sequence UGG(tryptophan) on the mRNA. What happens to the regulation of thetrypthophan operon in bacteria that has 1) high tryptophan and lowphenylalanine vs. bacteria that has low tryptophan and highphenylalanine?
