Typical conditions used for sterilization are
A. 100?C for 10 minutes.
B. 121?C at 15 psi for 15 minutes.
C. 80?C for 15 minutes.
D. 72?C for 15 seconds.
B
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Which are the MOST dominant chemolithotrophs in pelagic waters?
A) ammonia-oxidizing Archaea B) ammonia-oxidizing Bacteria C) sulfate-reducing Bacteria D) Prochlorococcus
2D chromatography is called that because
a. there are two steps: labeling with a radioactive marker and separation via chromatography. b. the molecules are separated into a linear arrangement, meaning two dimensions. c. the process separates the molecules in two directions, first along the x axis and then along the y axis. d. two different solutions are used in the paper chromatography process. e. two different types of radioactive markers must be used.
What is a possible disadvantage of using genetically modified crops?
A) The transgene may make its way into wild plants. B) Transgenic strains are typically less robust than the usual strains used for farming. C) The ability of transgenic plants to use nutrients is reduced so more fertilizer has to be applied. D) The ability of transgenic strains to use water is poor so these strains are not drought tolerant.
You wish to learn if the initiation of root hair formation depends on either translation or transcription. Roots were treated with actinomycin D, cycloheximide, and mock treated with a control solution without either of the two inhibitors. You find that root hair initiation was inhibited when mock treated with the control solution and in the presence of either cycloheximide or actinmycin D. From this you can conclude that:
A) Both transcription and translation are required. B) Only transcription is required. C) Only translation is required. D) More data is needed.