1. Wrong - there are dilutions that allow you to do the accurate calculation.
Try again


























































2. Right - this calculation is based on the results obtained with the 10-7 dilution.

Did you try working with the Tetracyclin Induced Expression System?





















































3. Wrong - You probably used the same tube (10-7 dilution) in two adjacent wells by mistake.

Try again























































4. Wrong - Don't use for your calculations a dilution that gives rise to less than 5 colonies.

Try again





















































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