#Question id: 5757
#XL - S Microbiology
A new E. coli mutant was tested for auxotrophy. The mutant grows on:
minimal medium (M) + arginine (A) + proline (P)
M + P + histidine (H)
M + A + H + P
but not on M or on M + A + H. The mutant requires
#Question id: 5758
#XL - S Microbiology
#Question id: 5758
#XL - R Botany
#Question id: 5760
#XL - S Microbiology
The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that
#Question id: 5760
#XL - R Botany
The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that
#Question id: 5761
#XL - S Microbiology
E. coli cells were spread on an agar plate, producing 1000 colonies. The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics. All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin. You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position. This demonstrates