影响酶的作用因素实验

2025-03-16 06:51:00
推荐回答(2个)
回答1:

原理:淀粉遇碘后,形成蓝色的复合物。淀粉酶可以可以使淀粉水解成麦芽糖,麦芽糖遇碘后,不形成蓝色的复合物。

1、材料:新配置的淀粉酶溶液,新鲜肝脏研磨液,可溶性淀粉溶液,过氧化氢溶液等。

2、步骤:

(1)探究温度对酶活性的影响

温度对酶活性的影响

在温度对酶活性的影响的实验中,三支试管的条件,除温度外均相同。3号试管处在60℃的温度条件下,酶活性最大,试管中的淀粉被分解,滴入碘液后不会变蓝。2号试管的温度条件是100℃, 这样高温度条件下,淀粉酶已失去活性,1号试管的温度条件是O℃,低温抑制淀粉酶的活性。

所以2号和1号试管中的淀粉都没有被分解,滴上碘液后都会变蓝,此实验可以证明;酶的催化作用需要适宜的温度条件,温度过高和过低都将影响酶的活性。

思考题 4、自变量是不同的温度;无关变量是可溶性淀粉溶液、新鲜淀粉酶溶液、碘液的量。

思考题 5、不能;因为如用斐林试剂来检验实验结果,需加热煮沸,会使低温试管中也出现砖红色沉 淀,从而影响实验结果、结论。

思考题 6、淀粉酶可以使淀粉逐步水解成麦芽糖和葡萄糖,麦芽糖和葡萄糖是还原性糖。

回答2:

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