Cell Cultures and Characteristics In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at -20 to -30°C -48 to -58°C -30 to -48°C -60 to -78°C -20 to -30°C -48 to -58°C -30 to -48°C -60 to -78°C ANSWER DOWNLOAD EXAMIANS APP
Cell Cultures and Characteristics To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of 8.90 3.5 8.5 6.79 8.90 3.5 8.5 6.79 ANSWER DOWNLOAD EXAMIANS APP
Cell Cultures and Characteristics Intestinal bacteria can grow in the presence of __________ whereas nonintestinal bacteria are usually inhibited. bile salts low levels of nitrogen sugars low concentration of various dyes bile salts low levels of nitrogen sugars low concentration of various dyes ANSWER DOWNLOAD EXAMIANS APP
Cell Cultures and Characteristics Which of the following problem makes it impossible to satisfy all of Koch's postulates? Microorganism causes serious symptoms in humans Species of microorganism is in question Genes from the microorganism cannot be amplified by PCR Microorganism cannot be isolated in pure culture Microorganism causes serious symptoms in humans Species of microorganism is in question Genes from the microorganism cannot be amplified by PCR Microorganism cannot be isolated in pure culture ANSWER DOWNLOAD EXAMIANS APP
Cell Cultures and Characteristics Which of the following is used for the proper maintenance and preservation of pure cultures? Periodic transfer to fresh media All of these Preservation by lyophilization Preservation by overlaying cultures with mineral oil Periodic transfer to fresh media All of these Preservation by lyophilization Preservation by overlaying cultures with mineral oil ANSWER DOWNLOAD EXAMIANS APP
Cell Cultures and Characteristics Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni? None of these Vacomycin Trimethoprim Polymyxin None of these Vacomycin Trimethoprim Polymyxin ANSWER DOWNLOAD EXAMIANS APP
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