Question

5. Which of the following purposes CANNOT be achieved by centrifugation?

A. Separating solid particles from a liquid medium with a lower density.

B. Separating solid particles from a liquid medium with a higher density.

C. Pelleting cells from their growth media.

D. Avoiding the liquid inside a tube being splashed out during tube opening.

E. None of the above.

Answer 1

In this case, none of the above. In fact, all of this can be achieved by centrifugation. This technique is based in the different densities of the components in a solution. No matter if one is less or more dense than the other. Indeed, centrifugation can separate miscible and immiscible solutions. Additionally, centrifugation is highly used to isolate the cell pellet from a growth media in order to make additional studies.