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 + 15 Which strain(s) is(are) prototroph(s)? Choose all correct answers. -1 for each incorrect answer to a total of zero.
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 + 15 Which strain(s) is(are) prototroph(s)? Choose all correct answers. -1 for each incorrect answer to a total of zero.
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
2.
4.
Which strain(s) is(are) prototroph(s)? Choose all correct answers.-1 for each incorrect answer to a total of zero.
Select all that apply:
a. None of the strains are prototrophs.
cross out
b. Strain 3
cross out
c. Strain 5
cross out
d. Strain 1
cross out
cross out
e. Strain 2
cross out,
f. Strain 4
+.
+.
+.
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