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- Briefly compare the composition of DNA versus that of RNA. Answer the following questions pertaining to the experimental use of green fluorescent protein (GFP). What is the main advantage of GFP in terms of protein visualization in cells/organisms? Which microscope technique is used to visualize GFP-tagged proteins?Explain why it is possible to model a DNA molecule as, a) electrically charged filament, b) elastic filament and c) random path filament.What was the procedure used to find and create nanotechnology?