You have a sample that is possibly contaminated by bacteria

You have a sample that is possibly contaminated by bacteria, for example, E
Coli. Propose a design to detect the amount of the bacteria in the sample. Use
schematics to illustrate your designs. Describe the biological element and transducing
mechanism

Solution

I have described the approaches, the steps and the principle below; you may prepare your own schematic.

Approach 1: Enumeration of bacteria

Approach 2: Quantification in terms of bacterial DNA

*Note that the volume may vary according to the bacterial load in the sample.