Laboratory Experiments in Microbiology (12th Edition) (What's New in Microbiology)
12th Edition
ISBN: 9780134605203
Author: Ted R. Johnson, Christine L. Case
Publisher: PEARSON
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Chapter 11, Problem 3CT
Will the isolated colonies always be in the fourth sector on the streak plate?
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what is the form, elevation, margin and colony color of this streak plate result?
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Laboratory Experiments in Microbiology (12th Edition) (What's New in Microbiology)
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- How many colonies are shown in the blue square?arrow_forwardTom streak plated an Unknown bacterium on Monday. On Wednesday, her plate showed a continuous streak of growth in two colors, but no distinct single colonies. List two possible reasons for these observations and why they may have affected the streak.arrow_forwardWhat is the function of the infection thread?arrow_forward
- Why are colonies that develop on a heavily seeded plate smaller than those that appear on a sparely seeded plate?arrow_forwardIdentify the texture, transparency, color, colony size, form, margin and elevation of the two colonies in the photo (a) and (b)arrow_forwardWhy is that bacterial slide agglutination technique important in diagnostic procedure?arrow_forward
- Approximately how many bacterial colonies are present on plate B?arrow_forwardA culture with approximately 4x105 cells/mL were incubated. After 10 hours, the number of cells had increased to 5x109. a) How long was the generation time in minutes?b) How many generations have occurred?arrow_forwardWhy are the results of plate counts expressed as the number of colony-forming units, rather than the number of cells?arrow_forward
- which agent was most effective against the spore-forming bacteria that was tested? How does the agent kill bacterial cells?arrow_forwardIn Figure 5-5,a. Why do A− and B− cells, by themselves, not formcolonies on the plating medium?b. What genetic event do the purple colonies in themiddle plate represent?arrow_forwardWhy is it necessary to sterilize the loop between streaks when streaking for single colonies?arrow_forward
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