Microbiology Questions

1.  Define natural competency?
2.  What is a serial dilution?
3  True or False.  You can use plaque assay to determine the number of a lysogenic phage?
4.  Can a spectrophotometer be used to measure viable counts of bacteria in culture?  
5.  Is transmittance or absorbance directly related to the concentration  particles present in a solution?
6.   Add 1 ml sample to 9 ml diluent → 1:10 (1/10, or 10-1or -1) dilution
      Add 1 ml sample to 99ml diluent → 1:100(1/100, or10-2 or -2) dilution
      Add 0.1ml to 0.9 ml diluent →                      ?                             dilution
     (use the 1st two examples as a guide to do the 3rd one)