The number of bacterial cells in a culture broth is to be determined by a culture technique. Serial dilutions were performed and a 0.1 mL aliquot from each dilution was spread onto Plate Count Agar (PCA). The number of bacterial colony forming units (CFU) after overnight incubation are shown as listed in the table below. What is the number of colony forming units per mL of the culture broth? Choose only the most appropriate plate for your calculation. Give your answer as the number only (do not add text for the units). You may use scientific notation with the format 1.12e+6 (that is, 1.12 x 106 cfu/mL). (Note: Canvas will then display your answer a whole number.) -3 Plate 1 10 dilution -4 Plate 2 10 dilution -5 Plate 3 10 dilution -6 Plate 4 100 dilution dilution dilution -7 Plate 5 10 -8 Plate 6 10 Number of colony forming units (CFU) TMTC* TMTC* 840 28 19 1

Human Anatomy & Physiology (11th Edition)
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The number of bacterial cells in a culture broth is to be determined by a culture
technique.
Serial dilutions were performed and a 0.1 mL aliquot from each dilution was spread
onto Plate Count Agar (PCA). The number of bacterial colony forming units (CFU) after
overnight incubation are shown as listed in the table below.
What is the number of colony forming units per mL of the culture broth? Choose only
the most appropriate plate for your calculation. Give your answer as the number only
(do not add text for the units). You may use scientific notation with the format
1.12e+6 (that is, 1.12 x 106 cfu/mL). (Note: Canvas will then display your answer a
whole number.)
Plate 1 10
Plate 2 10
Plate 3 10
dilution
dilution
dilution
Plate 4 10
dilution
Plate 5 107
dilution
Plate 6 10 dilution
-6
*Too many to count
Number of colony forming units (CFU)
TMTC*
TMTC*
840
28
19
1
Transcribed Image Text:The number of bacterial cells in a culture broth is to be determined by a culture technique. Serial dilutions were performed and a 0.1 mL aliquot from each dilution was spread onto Plate Count Agar (PCA). The number of bacterial colony forming units (CFU) after overnight incubation are shown as listed in the table below. What is the number of colony forming units per mL of the culture broth? Choose only the most appropriate plate for your calculation. Give your answer as the number only (do not add text for the units). You may use scientific notation with the format 1.12e+6 (that is, 1.12 x 106 cfu/mL). (Note: Canvas will then display your answer a whole number.) Plate 1 10 Plate 2 10 Plate 3 10 dilution dilution dilution Plate 4 10 dilution Plate 5 107 dilution Plate 6 10 dilution -6 *Too many to count Number of colony forming units (CFU) TMTC* TMTC* 840 28 19 1
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