Multiple choice The plasmid derived from E.coli plasmid Col E1 is YIP pYAC pBR-322 Ti-plasmid Reveal answer Fill a bubble to check yourself C Correct answer Explanation pBR-322 was one of the first widely used cloning vectors and was derived from E. coli plasmid Col E1. It contains antibiotic resistance genes (ampicillin and tetracycline) and multiple cloning sites, making it ideal for recombinant DNA work.