TOO MANY CELLS IN YOUR TEST TUBE?

Time to perform a virtual dilution!

Imagine that you have 125,000,000,000 (1.25 x 10¹¹) bacterial cells in 10 milliliters of water—far more than you need to conduct your lab experiments. Click a button below to select the method that will result in the least number of cells in the last dilution tube.

dilution animation

Option 3

Dilution

Here's What we did:

View Graph

Nice choice! See the dilution in action to verify that the 1/100 dilution series will result in the least number of cells in the last tube.

You selected the 1/100 x 1/100 x 1/100 x 1/100 series to reduce the total number of cells in the fourth and final test tube.

In each of the four steps, one one-hundredth of the cells in the test tube were moved to the next test tube. This step-wise movement of cells results in a consistent drop in the number of cells.

We can plot the concentration of cells in each of the four test tubes as a linear relationship on a graph.

the global burden of Tuberculosis