How do you select for cells that have recombinant plasmids? Cloning How do you select for cells that have recombinant plasmids? Answer: Grow cells on plate of intact antibiotic (B), and another plate with both antibiotics (G + B). Cells that grown on B but not G+B contain recombinant plasmids. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+