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呼吸作用是生物新陈代谢过程很重要的一个方面,而厌氧呼吸又是高中生物教材中学生较难理解的内容之一.在“呼吸作用”的教学活动中增加厌氧呼吸的演示实验是很必要的. 1.原理: 葡萄糖在酵母菌多种酶的作用下,经发酵可产生酒精和二氧化碳.闻到酒香味,检查出二氧化碳的生成,即可了解酵母菌厌氧呼吸的过程.而现行教科书中,以饱和石灰水变混浊检查CO_2的生成.由于生物
Respiration is a very important aspect of the metabolic process of biology, and anaerobic respiration is one of the more difficult contents to be understood by students in high school biology textbooks. Demonstration experiment of adding anaerobic respiration to the teaching activities of “respiration” is very necessary. 1. Principles: Glucose under the action of various yeast enzymes, can produce alcohol and carbon dioxide through fermentation. Smell the smell of wine, check out the formation of carbon dioxide, you can understand the process of yeast anaerobic respiration. And the current textbook , turbidity with saturated lime water to check the formation of CO_2.