PreQuiz (See related pages) 1 When a sample is heavily populated with microbes, the microbes are generally visible to the naked eye. A) True B) False 2 Laboratory techniques that exclude unwanted microbes are called __________. A) ubiquitous B) aseptic C) invisible D) manipulations 3 The neck of open culture tubes should be sterilized after removing the cap and before replacing the cap. Open tubes should always be ___________ to minimize the possibility of airborne contamination. A) held at an angle B) labeled with tape C) carried in a sleeve D) inoculated with the nondominant hand 4 Which part of the flame of a Bunsen burner is used for sterilization of inoculating tools? A) The tip of the inner cone B) The tip of the outer cone 5 In the loop dilution method, which plate will contain the greatest number of colonies? A) I B) II C) III
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