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Question
Biology
Posted 10 months ago
Would the plaque assay be useful for calculating lambda phage titers? Explain your reasoning.
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Answer from Sia
Posted 10 months ago
Answer
Yes, the plaque assay would be useful for calculating lambda phage titers.
Solution
a
Principle of Plaque Assay: The plaque assay is a method used to measure the number of viral particles present in a sample
b
Application to Lambda Phage: Lambda phage, a bacteriophage, forms clear plaques on a lawn of bacteria, which can be counted to determine the viral titer
c
Calculation of Titer: The number of plaques counted is used to calculate the titer of the phage suspension by using the formula Titer (PFU/ml)=Number of plaquesVolume of phage suspension plated (ml)×Dilution factor \text{Titer (PFU/ml)} = \frac{\text{Number of plaques}}{\text{Volume of phage suspension plated (ml)}} \times \text{Dilution factor}
Key Concept
Plaque assay for viral titer determination
Explanation
The plaque assay is a quantitative method that allows for the determination of the number of infectious virus particles in a sample, which is applicable to lambda phage.

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