Can somebody pleasee help me DNA strands are so tiny that you can't even see them with a microscope. The
procedure
scientists use to sort and measure DNA is called . The gel is the filter that sorts DNA fragments because it contains many small holes. DNA makes it visible to the naked eye. The gel in gel electrophoresis is made of a dried powder called and a . The solution is first melted in the microwave, and then
poured into a using a to form wells at
one end. The molded gel is then placed into a . The next step is to . Using a clean pipette, first you add the to the
. This solution is then transferred to
. The next step is to
. The presence of bubbles
coming from the electrodes is proof that . Because DNA has a charge it will move to the end of the gel. The next step is to the gel so that the bands can be seen when
placed under . The size of the DNA fragments is
measures in units of . After analyzing the results, the
approximate size of the bands are , , and