Five different strains of E. coli (1, 2, 3, 4 and 5) were streaked onto a series of tester plates. After incubating the streaked plates for an appropriate amount of time, they were scored for growth (+) or no growth (-) of the various strains on each respective plate. MM denotes minimal medium, CM denotes complete medium and letters A, B and C denote the supplements added to minimal medium. Assume supplements A, B and C construct the complete biochemical pathway. The results are shown below. Tester Plate Strain MM MM + A MM + B MM + C CM 1 3 4 Which strain(s) is(are) auxotroph(s)? Choose all correct answers. Select all that apply: a. Strain 4 cross out b. Strain 1 cross out O c. Strain 3 cross out d. Strain 5 cross out e. None of the strains are auxotrophs. cross out f. Strain 2 cross out
Five different strains of E. coli (1, 2, 3, 4 and 5) were streaked onto a series of tester plates. After incubating the streaked plates for an appropriate amount of time, they were scored for growth (+) or no growth (-) of the various strains on each respective plate. MM denotes minimal medium, CM denotes complete medium and letters A, B and C denote the supplements added to minimal medium. Assume supplements A, B and C construct the complete biochemical pathway. The results are shown below. Tester Plate Strain MM MM + A MM + B MM + C CM 1 3 4 Which strain(s) is(are) auxotroph(s)? Choose all correct answers. Select all that apply: a. Strain 4 cross out b. Strain 1 cross out O c. Strain 3 cross out d. Strain 5 cross out e. None of the strains are auxotrophs. cross out f. Strain 2 cross out
Chapter10: Reconstitution Of Powdered Drugs
Section: Chapter Questions
Problem 33SST
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Transcribed Image Text:Five different strains of E. coli (1, 2, 3, 4 and 5) were streaked onto a series of tester plates. After incubating the streaked plates for an
appropriate amount of time, they were scored for growth (+) or no growth (-) of the various strains on each respective plate. MM denotes
minimal medium, CM denotes complete medium and letters A, B and C denote the supplements added to minimal medium. Assume
supplements A, B and C construct the complete biochemical pathway. The results are shown below.
Tester Plate
Strain
MM
MM + A MM + B MM + C
CM
1
3
4
Which strain(s) is(are) auxotroph(s)? Choose all correct answers.
Select all that apply:
a. Strain 4
cross out
b. Strain 1
cross out
O c. Strain 3
cross out
d.
Strain 5
cross out
e.
None of the strains are auxotrophs.
cross out
f.
Strain 2
cross out
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