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例1一透析袋(其膜为半透膜)中装有物质M和分解它的酶,此袋放在盛有蒸馏水的容器中,第二天检查时,在蒸馏水中发现有物质X,根据这一观察,下列哪项是正确的:①酶分解了物质X;②M被分解;③X是物质M的组成成分;④X能透过透析袋。A.①②③B.②③④C.①③④D.①②④[解析]由半透膜(如?
Example 1 A dialysis bag (the membrane of which is a semipermeable membrane) contains a substance M and an enzyme that decomposes it. The bag is placed in a container containing distilled water. When examined on the next day, a substance X is found in distilled water. In this observation, which of the following is correct: 1 The enzyme decomposes substance X; 2M is decomposed; 3X is a constituent of M; 4X penetrates the dialysis bag. A.123B.234C.134D.124 [Analysis] by semipermeable membrane (such as?