高一生物 课程:酶
Quiz
•
Biology
•
10th - 12th Grade
•
Practice Problem
•
Medium
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
陈同学为测试温度对酶作用的影响,实验开始的温度是90⁰C ,之后逐渐降低至0⁰C ,并定时记录其产物的产量。结果发现没有任何产物出现。以下哪项是最好的解释?
陈同学使用了过期的酶
陈同学试验态度不严谨
陈同学错误地破坏了酶
陈同学拿错了化学反应物
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
酶作用的诱导契合模型说明了,
当酶和底物结合时,
会发生什么情况?
酶改变其活性部分的结构
底物改变其部分结构
酶和底物都会改变部分的结构
酶的非活性部位的结构改变
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
以下哪一项有关酶的辅助因子的叙述
是正确的?
辅助因子都具有专一性
辅助因子较酶易受热分解
辅助因子都必须与酶结合才能引发酶的作用
全部酶都需要辅助因子的协助才能进行催化作用
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
在固定量的酶和底物参与下,某种酶在高(40度)、中等(30度)和低温(20度)条件下催化某化学反应。若反应时间充足,则何种条件下的生成物的量会是最高?
高温条件
中等温度条件
低温条件
三者都会有一样多的生成物
5.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
若一20°C酶溶液具有饱和底物,下列何种做法有助于提升产物的生成效率?
(多选)
加热至40°C
增加底物浓度
增加酶的浓度
加长反应时间
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
酶遇到下列哪种情况就会失去作用,
但条件改变后仍可恢复催化能力?
与汞结合
温度过低
温度过高
与铅结合
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
以下何者并非酶的特性?
专一性
重复使用性
催化性
变异性
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