試題詳解

22. Assume that you were given a vial containing 0.05μg/μl of DNA and you are asked to set up a reaction which calls for 100ng of DNA. What volume of fluid from the vial would you deliver?
(A) 20 ml
(B) 200 μl
(C) 2 ml
(D) 2 μl
(E) 20 μl