Question

Do the virtual gel electrophoresis activity (see link in prelab module) and read section 12.13 in your book. What is the purpose of the comb in gel electrophoresis? O it detangles the agarose molecules in the gel it makes holes in the gel O it thickens the gel it produces electricity Question 4 0.5 pts What is the electrical charge on a DNA molecule? (positive or negative)

Answer 1

What is the purpose of combination in gel electrophoresis ?

Answer - It produces electricity. ( Reason - Gel electrophoresis is used to separate the DNA fragments according to their size. DNA samples are loaded into a well at one side of gel, and electric current is applied to pull them through gel. )

Question no. 4 - what is the electrical charge on DNA molecule

Answer - DNA contains negative charge because the presence of phosphate group.