A cell has five molecules of a rare mRNA. Each cell contains 4 × 105 mRNA molecules. How many clones one will need to screen to have 99% probability of finding at least one recombinant cDNA of the rare mRNA, after making cDNA library from such cell?

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4.05 × 105

A cell has five molecules of a rare mRNA. Each cell contains 4 × 105 mRNA molecules. How many clones one will need to screen to have 99% probability of finding at least one recombinant cDNA of the rare mRNA, after making cDNA library from such cell?

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