Mic 205 exam 2 questions with correct answers

Growth CORRECT ANSWER Refers to an increase in cell number Discrete colony CORRECT ANSWER Aggregation of cells visible on surface of solid media Dispersed cells CORRECT ANSWER Single cells suspended in liquid medium Complex biofilm CORRECT ANSWER Community of one or more species of bacteria Clinical specimens CORRECT ANSWER Human materials examined or tested for presence of bacteria and other microbes Considerations of clinical specimens CORRECT ANSWER Technique, timely delivery, proper culture methods Quadrant streak CORRECT ANSWER Method used for obtaining colonies on a plate. Each of which arise from a single progenitor cell or colony forming unit. Single colonies are used to establish pure culture bacteria. Aseptic technique CORRECT ANSWER Used to prevent contamination of sterile cultures and objects and to protect the the clinician from exposure to potential pathogens. Selective media CORRECT ANSWER Nutrient agar and dextrose agar plates inoculated with diluted soil samples. The slightly acidic ph of the dextrose agar selects for fungi by inhibiting bacterial growth.