A plaque assay is performed beginning with 1 mL of a solution containing bacteriophages. This solution is serially diluted three times by combining 0.1 mL of each sequential dilution with 9.9 mL of liquid medium. Then 0.1 mL of the final dilution is plated in the plaque assay and yields 17 plaques. What is the initial density of bacteriophages in the original 1 mL?

Hello everyone and welcome to today's video. Today, we have a very short video. Let's jump straight into it. We have in plaques, plaques are accounted to identify the tighter of the original stock example, which is usually reported as well. I want you to recall from previous videos the units that this is going to be be reported as, and it's going to be plaque forming units divided by milliliters, which can be just simplified to P. A. U. Divided by milliliters. And this is going to be represented by answer choice A. That is the final answer to our question. And I really hope this video helped you.