Answer to Question #10517 in Microbiology for Raquel Smedley

Question

Can you name 3 beverages that are prepared by microbial process, their substrates and the microorganism

Answer 1

1) Beer. Yeast (Saccharomyces cerevisiae), once added to the wort, a liquid made of barley, hops, sugar and water, converts the sugar (substrate) in the wort to alcohol and carbon dioxide (creating bubbles in the beer).
2) Wine. Like beer, wine is made using yeast, but instead of hops and barley, the starter material is obviously grapes. Microorganism used in this process is Saccharomyces cerevisiae, and substrate is sugar.
3) Kefir. Kefir grains, which are a symbiotic culture of yeasts and bacteria are used to make kefir. Substrate is lactose of milk.