Relate how shampoo performs the same function on your hair as it does on cell membranes in this laboratory activity - extracting DNA. Why is it important to have "balanced" centrifuge? What is the importance of salt and alcohol in DNA extraction?

You are trying to determine the base content for a number of samples in the lab (mouse DNA, bacterial DNA, single-stranded DNA virus and double-stranded RNA virus).  Unfortunately, you failed to use an alcohol-proof marker and during the ethanol precipitation of your samples the labels came off the tubes.  You finish the experiment anyway and try to use the data to determine the samples.  Can you determine the source of each sample based on your results?  Briefly explain how you come to your designations.   Sample % adenine % cytosine % guanine % thymine % uracil     A 18 32 32 18 0     B 26 18 32 24 0     C 31 19 19 0 31     D 10 40 40 10 0

In DNA extraction where ethanol was used why does the DNa float