Cells that contain only circular chromosomes are most probably which of the following?
a. Protist cells
b. Fungal cells
c. Bacterial cells
d. Plant cells
e. Animal cells
Ans: c. Bacterial cells
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A gel electrophoresis is performed, but when the gel imager is used, no bands appear. The researcher might have forgotten to:
_____ add electric current. _____ add antibody. _____ ligate the DNA fragments together. _____ include DNA dye. _____ include an RNA probe. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about gel electrophoresis? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The first step in sewage treatment is ________.
A. filtration B. aeration and settling C. sedimentation D. chlorination
Which membrane would show a more rapid recovery of fluorescence in a FRAP study?
A. a membrane containing equal amounts of saturated and unsaturated fatty acids B. a membrane containing a larger proportion of saturated fatty acids C. a membrane containing a larger proportion of unsaturated fatty acids D. The saturation of fatty acids in a cell membrane does not affect the speed of fluorescence recovery in a FRAP study. E. a membrane containing a large amount of cholesterol
Traditional medicines, which are used by the majority of people in less developed countries, are primarily derived from
A) animals. B) rock. C) water. D) commercially purchased ingredients. E) plants.