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Gaokao Biology Practice Question

某同学研究某因素对酶活性的影响，实验处理及结果如下：己糖激酶溶液置于45℃水浴12min，酶活性丧失50%；己糖激酶溶液中加入过量底物后置于45℃水浴12min，酶活性仅丧失3%。该同学研究的因素是（ ）

  1. A.温度
  2. B.底物
  3. C.反应时间
  4. D.酶量

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