what are the steps to observe fermentation of sugar by yeast
Answers
Answer: While it's clear that yeast requires sugar for fermentation, there are many different sugars that yeast could use for fuel. You can perform a number of experiments to determine which ones promote the highest level of yeast growth. In one, you can add yeast to various beverages, such as fruit juices and non-carbonated sports drinks to see which environment produces the most CO2. Another can use various sweeteners such as granulated sugars, syrups and nectars (such as agave) placed in weak solutions. You can measure CO2 production with balloons placed over the reacting test tubes, or simply observe the bubbles produced and make a relative comparison.
Aim:
Aim: To study fermentation of sugar into alcohol by the action of yeast.
Materials required:
sugar, cups, lukewarm water, yeast
Procedure:
Take lukewarm water in a cup and add 3-4 teaspoons of sugar to it. Stir it well. Now, add half teaspoon of yeast to this solution. Cover the cup and keep it undisturbed for about 5-6 hours. After the said time, open the lid. You will smell alcohol. The yeast, that we added, fermented the sugar in the cup and converted into alcohol.