A. Write down the function of the following reagents while used in genomic DNA from onion cells: 2. A Sodium lauryl sulphate (SDS) Sodium citrate: Chloroform: Ethyl alcohol: 3. A List factors that affect movement of DNA in an agarose gel electrophoresis 4. A. What are restriction endonucleases? B. What are the applications of restriction enzymes in molecular biology? C. You were given a plasmid DNA (circular) and viral (linear) DNA of unknown nucleotide sequence and asked to determine the number of EcoR1 site(s). After EcoRI digestion, agarose gel electrophoresis and DNA staining of the gel following results were obtained.