Author Question: A lab technician has four strains of bacteria. Although he forgot to label them, he knows that they ... (Read 65 times)

Mr.Thesaxman · **on:** Jan 12, 2022

A lab technician has four strains of bacteria. Although he forgot to label them, he knows that they include one F+ strain, one Hfr strain, one F' strain, and one F- strain. He observed the following results after plating these strains on different media. Which of the following plates can be used to identify the F- strain?

strain	his	glu	cys	leu	str
F+	+	+	+	-	+
Hfr	+	+	+	+	-
F'	+	+	+	+	-
F-	-	-	-	+	+

◦ complete media
◦ minimal media with histidine, glutamate, and cysteine
◦ minimal media with histidine, glutamate, cysteine, and streptomycin
◦ minimal media with streptomycin
◦ minimal media with leucine and streptomycin

jliusyl · **Reply #1 on:** Jan 12, 2022

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