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Short answer: Unlike the physical model you're describing above, the reality is that localisation of biomolecules in the cell isn't a passive process, instead molecules are actively concentrated where they're required to be by a variety of different mechanisms. long answer: I think possible 'missing pieces' of this picture which may help you reconcile these ...


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It seems to me that you are becoming confused because you are thinking of DNA in the same way that one things about small molecules. When molecules are enormous, however, they act more like a material than a simple molecule and have no single structure. A good starting place for learning how to think about DNA as a large molecule is to learn about polymer ...


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Dipstick urinalysis? source The urine dipstick has a bunch of squares, each with a chemical analysis ready to go. The dip will semiquantitatively show you what is in the urine. My bet would be hemoglobin but various urine dipsticks will have various substances on there. A dipstick will detect hemoglobin which will come out of any blood cells once they ...


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