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Biochemical Tests

Using the South University Online Library or the Internet, research about biochemical tests. Based on your research and readings, respond to the following:

• Why is it important to have a pure culture and not a mixed culture when performing biochemical tests?
• How does culturing an organism on several different types of media can help identify an organism in a relatively short period of time?
• What is the technique used to isolate pure cultures from a specimen that contains mixed flora? Describe the technique.
• What are the characteristics by which bacterial colonies may be distinguished? Describe at least four such characteristics.