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A culture of Staphylococcus of unknown density is diluted as follows (letters represent each step): • 60 mL of a bacterial culture is diluted by adding 440 mL of water • 1000 microliters from (A) is added to 9 mL of water • Dilution (B) is used to prepare a 103 dilution in water • 100 uL from dilution (C) is plated to nutrient agar and incubated at 37°C Following incubation, colonies are uniformly distributed on the agar, and 102 colonies are counted on one half of the plate. 1. Express the total CFU/mL of the original culture in scientific notation. 2. If 10 uL is plated from dilution (C), how many colonies should grow on the plate?

A culture of Staphylococcus of unknown density is diluted as follows (letters represent each step): • 60 mL of a bacterial culture is diluted by adding 440 mL of water • 1000 microliters from (A) is added to 9 mL of water • Dilution (B) is used to prepare a 103 dilution in water • 100 uL from dilution (C) is plated to nutrient agar and incubated at 37°C Following incubation, colonies are uniformly distributed on the agar, and 102 colonies are counted on one half of the plate. 1. Express the total CFU/mL of the original culture in scientific notation. 2. If 10 uL is plated from dilution (C), how many colonies should grow on the plate?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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A culture of Staphylococcus of unknown density is diluted as follows (letters represent each step): • 60 mL of a bacterial culture is diluted by adding 440 mL of water • 1000 microliters from (A) is added to 9 mL of water • Dilution (B) is used to prepare a 103 dilution in water • 100 ul from dilution (C) is plated to nutrient agar and incubated at 37°C Following incubation, colonies are uniformly distributed on the agar, and 102 colonies are counted on one half of the plate. 1. Express the total CFU/mL of the original culture in scientific notation. 2. If 10 ul is plated from dilution (C), how many colonies should grow on the plate? Edit View Insert Format Tools Table
Transcribed Image Text:A culture of Staphylococcus of unknown density is diluted as follows (letters represent each step): • 60 mL of a bacterial culture is diluted by adding 440 mL of water • 1000 microliters from (A) is added to 9 mL of water • Dilution (B) is used to prepare a 103 dilution in water • 100 ul from dilution (C) is plated to nutrient agar and incubated at 37°C Following incubation, colonies are uniformly distributed on the agar, and 102 colonies are counted on one half of the plate. 1. Express the total CFU/mL of the original culture in scientific notation. 2. If 10 ul is plated from dilution (C), how many colonies should grow on the plate? Edit View Insert Format Tools Table
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