plasmid questions -1

http://www.sci.sdsu.edu/~smaloy/MicrobialGenetics/problems/plasmids/

1. It is often desirable to maintain two different plasmids in a single cell. What are two important considerations when choosing the plasmids to use?

ANSWER: The plasmids should be compatible so they can stably co-exist in the same cell, and the plasmids should have distinguishable phenotypes so you can insure that both plasmids are present (ideally a phenotype that is selectable).