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You are the manager of a culture collection of

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36.You are the manager of a culture collection of bacteria that have been isolated from diverse environmentsaround the planet. A bioprospecting company requests an organism from which to isolate a lactase enzymethat rapidly digests the lactose in milk at fridge temperature (4°C). Which class of organism would you suggestthey study?A.A thermophileD.A mesophileB.A psychrophileE.A hyperthermophileC.A halophile
Test Form: A37.Glucose fermentation by some microbes results in the accumulation of acids such as acetate and lactate in themedium, which are often toxic and dangerous to the cell in high concentrations. The creation of these acidbyproducts is often necessary in order to:
38.True or False: when DNA polymerase and RNA polymerase collide head‐on, the RNA polymerase is typicallyknocked off the DNA molecule while the DNA polymerase hangs on.
39.The soil bacterium (and opportunistic pathogen)Pseudomonas aeruginosais capable of generating energy by awide variety of processes. Which mode of growth do you think would usually allowPseudomonasto achievethe highest possible growth rate?
40.Carboxysomes and Enterosomes share which feature?A.A lipid membrane bilayerD.All of the aboveB.A shell of proteinE.None of the aboveC.Contain RuBisCo
41.Which of the following cellular structures is composed primarily of a phospholipid membrane?
Test Form: A42.Say you knew only one thing about an unknown bacterium you are starting to identify. Which of the followingwould tell you that it must be Gram‐negative?

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Term
Spring
Professor
AlexAppleman

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