Derrick has a flask with 50 ml of LB medium and 1 x 10^9 bacteria (or Colony Forming Units - cfus). He is trying to plate between 10 and 100 colonies per plate. He must construct a dilution series. So he adds 50 µL of his bacteria to a new tube with 9.5x10^-1 ml of fresh LB medium.

If Derrick now transfers 10^-4 litres from this tube to a plate, how many cfus will be on the plate?

Answer rating: 100% (QA)

No of Bacteria CFU in Original 50 ml of LB medium 1 x 109 bacteria o... View the full answer