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一、如何理解“探究影响酶活性的条件”实验过程中实验步骤的顺序性例1某同学为验证温度对酶活性的影响,设计了下表中的实验步骤。下列评价中不合理的是()序号项目试管1试管21新鲜唾液2滴2滴2可溶性淀粉溶液2mL2mL3水浴0℃60℃6斐林试剂1mL1mL7结果砖红色沉淀A.缺少37℃的对照
First, how to understand the “exploration of the conditions affecting the activity of the enzyme,” the sequence of experimental procedures during the experiment Example 1 A student to verify the temperature of the enzyme activity, designed the experimental steps in the following table. Unreasonable in the following evaluation is () No. Item Test tube 1 Test tube 21 Fresh saliva 2 drops 2 drops 2 Soluble starch solution 2mL 2mL 3 Water bath 0°C 60°C 6 Filin reagent 1mL 1mL 7 Results Brick red precipitate A. Absence of 37°C control