[问答题]
Gel electrophoresis is a te
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i-gq(so r 8 wd8fpt2l4hnique often used to analyse DNA molecules. It includes a gel and an elect
 ( w8ls-tri42dgf pq8oric field. The diagram below shows the outcome of gel electrophoresis.
 
1.DNA is a type of nucleic acid. State one location where DNA is found in cells.
2.Deduce, with a reason, which direction the DNA fragment moves through the gel.
3.Distinguish between the functions of DNA and RNA in unicellular organisms.