Multiple Choice
0.2 mls of a 10-4 dilution of a virus preparation yields 90 plaques.What is the number of PFU per ml in the undiluted virus preparation?
A) 9.0 * 105
B) 4.5 * 106
C) 4.5 * 107
D) 9.0 * 108
Correct Answer:
Verified
Correct Answer:
Verified
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