Question

One of the most common problem using yeast as a cell for producing a protein product is the contamination of bacteria. If a protein product has to be produced through yeast, what could be the solution to ensure that bacterial contamination is avoided.

• A. Usage of bacteria to produce the protein instead of yeast
• B. Using closed type fermenter for yeast culturing
• C. Sterlizing the lab before innoculation of the yeast into the media.
• D. Both B and C

Answer 1

The correct option is B Using closed type fermenter for yeast culturing

Using closed fermenters is the best method of culturing yeast. In a closed fermenter the chances of contamination is greatly decreased and the output of yeast is excellent. Compared to this, an open fermenter can invite contamination from a host of different bacteria. Closed fermenters are used in liquor industry where the yeast is very important in the making of beer and wine.