02 Mls of a 10^-4 Dilution of a Virus Preparation

question 48

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

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