A phageInfected bacterial culture was subjected to a series
     A phage-Infected bacterial culture was subjected to a series of dilutions, and a plaque assay was performed in each case, with the results shown in the following table.  Which of the following explains the result of the 10^4 and 10^5 dilutions?  Select all correct statements.  In the 10^4 dilution, the concentration of phage is too high.  In the 10^4 dilution, the concentration of phage is too low.  In the 10^6 dilution, the concentration of phage is too high.  In the 10^6 dilution, the concentration of phage is too low. 
  
  Solution
Answer: Options A and D are correct.
 Explanation:
 In 10^4 dilution, the phage concentration is too high. Hence all the bacterial cells are lysed.
 In 10^6 dilution, the phage concentration is too low. Hence no bacterial cell is lysed.

