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Unformatted text preview: - required in small amounts 2. Special metabolites ( growth factors ) a. Substances required for growth that the cell cannot produce using the basic requirements already listed. ( Ex. : vitamins, amino acids, carbohydrates, blood factors ) b. Organisms may be described as being fastidious. 3. Two types organisms based on source of nutrients : a. Autotrophs - utilize inorganic compounds ( C - CO 2, carbonates; N - NH 4 , N 2 , NO 3 ) b. Heterotrophs - utilize organic compounds ( C - CHO, lipids; N - proteins ) 1). Saprophytes - nonliving organic material 2). Parasites - viable (living) organic material 4. To culture organisms in the laboratory : a. Must provide organism with necessary growth factors b. Various types media - to be described in lab 5. Not all bacteria use same nutrients like humans. Can test for nutritional requirements in lab. Differences in nutritional requirements used for identification, classification...
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.
- Fall '09