Definition of tae kwon do for English Language Learners. : a style of fighting that originated in Korea and that uses kicks and punches but no weapons. Britannica.com: Encyclopedia article about tae kwon do.
It is also used in the baking process as a leavening agent; yeast releasing gas into their environment results in the spongy-like texture of breads and cakes. Because of its role in fermentation, humans have known about and used Saccharomyces cerevisiae for a long time.
If fermentation is not rapid because of the yeast used, then the whole experiment can be carried over to the second lesson. Yeast has an enzyme called zymase and this catalyses the fermentation process. Glucose zymase â Ethanol + carbon dioxide. C 6 H 12 O 6 (aq) â 2C 2 H 5 OH(aq) + 2CO 2 (g) Student questions Here are some possible questions to ask students: