2. You have just created three different derived strains from E. coli K12. One strain contains a deletion in a gene critical for biosynthesis of diaminopimelic acid, one strain lacks dnaQ, and the last strain lacks both. Describe experiments to clearly differentiate between these three strains through phenotypic assays alone (not just by sequencing the genomes or any derivative of genotyping). Include all necessary controls to interpret the experiments. (7.5 points).