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Microbiology Lab Final Review 2025 Questions and Answers Plasmids used as cloning vectors have a gene for antibiotic resistance that allows the detection of successfully transformed cells by using a medium that has the antibiotic that the plasmid confers resistance to. This antibiotic containing medium would be be described as_______________. enriched - --CORRECT ANSWER--selective When viewing Elodea under a microscope, what is the most likely identity of green, round structures inside of the cell? - --CORRECT ANSWER--Chloroplasts Once an unknown bacterium has been isolated in pure culture, what is the first step in the identification process? - --CORRECT ANSWER--determine the Gram stain morphology How long should hands be lathered while washing? - --CORRECT ANSWER--20 seconds When enzyme activity has reached stability, an increase in the enzyme concentration will - --CORRECT ANSWER--will not make any difference in the enzyme rate. ....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1