#Question id: 5273
#XL - S Microbiology
Replica plating
#Question id: 5274
#XL - S Microbiology
Among the easiest of the mutations to isolate are those which
#Question id: 5275
#XL - S Microbiology
The designation his- refers to
#Question id: 5277
#XL - S Microbiology
Deduce the genotype of bacteria strain was shown either growth presents or not in different media?
|
Media supplement |
||||
|
Minimal |
Minimal + Arginine |
Minimal + Methionine |
Minimal + Arginine+ Methionine |
|
|
Growth |
No |
Yes |
No |
Yes |
#Question id: 5279
#XL - S Microbiology
In a transduction experiment, phage P1 is grown on a bacterial host of genotype A+ B+ C+ and the resulting lysate is used to infect a recipient strain of genotype A– B– C–. The genes are in an order such that B is in the middle, and the distance between A and B is greater than the distance between B and C. Based on this information, which of the following least genotype?
#Question id: 5281
#XL - S Microbiology
In the mating Hfr Strs met+ his+ leu+ trp+ Ala+ X F- Strres met- his- leu- trp- Ala-. At regular interval time, the mating cells are interrupted and the cell suspensions plated on four different growth media with streptomycin. The amino acids in the growth media and the number of colonies observed on each are as follows:
|
Interrupted time |
Composition of media |
Growth |
||||
|
His |
Leu |
Ala |
Trp |
Met |
||
|
2 min |
+ |
- |
+ |
+ |
+ |
Yes |
|
10 min |
+ |
- |
- |
+ |
+ |
Yes |
|
12 min |
+ |
- |
- |
+ |
- |
No |
|
15 min |
+ |
- |
- |
- |
+ |
Yes |
|
20 min |
- |
- |
- |
- |
+ |
Yes |
What is the order of transfer of the genes?