Biology

Biology, 19.11.2019 16:31, kirstenb278

If you try to grow a bacterium for the first time, do you grow on defined or undefined medium

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Biology, 08.10.2019 04:20, brae3648

You are studying a biochemical pathway in the mold neurospora where enzyme 1 converts the initial substrate into intermediate substrate a; enzyme 2 converts intermediate substrate a into intermediate substrate b; enzyme 3 converts intermediate substrate b into intermediate substrate c; and enzyme 4 converts intermediate substrate c into the end product, an amino acid that is essential for growth. you isolate a mutant that is unable to grow on minimal media. which data would provide the strongest support for the hypothesis that this mutation occurred in the gene that codes for enzyme 2? a. the mold can grow on rich medium plus intermediate substrate c, but not on rich medium plus intermediate substrate b.b. the mold can grow on minimal medium plus intermediate substrate b, but not on minimal medium plus the initial substrate.c. the mold can grow on minimal medium plus intermediate substrate b, but not on minimal medium plus intermediate substrate a.d. the mold can grow on rich medium plus intermediate substrate d, but not on rich medium plus intermediate substrate c.e. the mold can grow on minimal medium plus intermediate substrate a, but not on minimal medium plus intermediate substrate c.

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Biology, 09.10.2019 22:00, Damagingawsomeness2

Wild-type bacteria can grow on minimal medium. four mutants that cannot grow on minimal medium but can grow on minimal medium supplemented with the nutrient "h" are isolated. it is suspected that metabolites t, p, and a are in the biochemical pathway for synthesis of h, so each mutant is tested for the ability to grow on minimal medium supplemented with these metabolites: a. mutant 1: can grow on minimal medium supplemented with t, but not p or a b. mutant 2: is unable to grow on minimal medium supplemented with t, p, or a c. mutant 3: is able to grow on minimal medium supplemented with a or t, but not p d. mutant 4: can grow on minimal medium supplemented with t, p, or a.

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Biology, 14.10.2019 19:30, dshood2298

Looking at your results of the ames test , using bacteriological agar medium plates lacking the amino acid histidine, you find that there are many colonies growing on the agar. your interpretation of this result is: a. the bacterium has turned its operon genes on, producing proteins necessary for growth b. the chemical being tested is mutagenic c. the bacterium does not have any plasmids, so it cannot grow on the medium d. the drug being tested has no inhibitory effect on the bacterium, therefore it is not a good antibiotic to give for treatment of disease

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Biology, 16.11.2019 22:31, annikafischer

Wild-type bacteria can grow on minimal medium. four mutants that cannot grow on minimal medium but can grow on minimal medium supplemented with the nutrient “c” are isolated. it is suspected that metabolites a, b, and d are in the biochemical pathway for synthesis of c, so each mutant is tested for the ability to grow on minimal medium supplemented with these metabolites. mutant 1: can grow on minimal medium supplemented with a, but not b or d mutant 2: is unable to grow on minimal medium supplemented with a, b, or d mutant 3: is able to grow on minimal medium supplemented with b or a, but not d mutant 4: can grow on minimal medium supplemented with a, b, or d. which of the following is not consistent with this information? a. mutant 2 will cause a build up of metabolite d b. mutant 1 will cause a build up of metabolite b c. mutant 3 blocks the conversion of metabolite d → metabolite b d. mutant 2 blocks a step right before metabolite c. e. mutant 4 blocks a step before all 4 metabolites.

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If you try to grow a bacterium for the first time, do you grow on defined or undefined medium...

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