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【简答题】
称取25mg的蛋白酶粉配制成25ml酶液,从中取出0.1ml,以酪蛋白 为底物用Folin-酚比色法测定酶活力,结果表明每小时 产生1500μg酪氨酸。另取2ml酶液,用凯氏定氮法测得蛋白氮为0.2mg。若以每分钟产生1μg酪氨酸的量为1个活力单位计算,根据以上数据,求:A、1ml酶液中蛋白的含量及活力单位。 B .1g酶制剂的总蛋白含量及总活力。 C . 酶比活力
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举一反三
【单选题】Monetary policy and______policy are the two basic tools used by the government to influence the course of economic activity.
A.
accounting
B.
fiscal
C.
financial
D.
trade
【单选题】Monetary policy in the US is operated by the Federal Open Market Committee. Which entity is responsible for making day-to-day transactions on its behalf?______.
A.
The Federal Reserve Board
B.
The chairman of the Federal Reserve banks
C.
The New York Federal Reserve bank
D.
The fiscal agent
【简答题】试比较脊索动物与无脊椎动物的主要不同点。 为什么说头索动物在脊索动物的进化上是一侧支?
【单选题】Much of the language used to describe monetary policy, such as 'steering the economy to a soft landing' or 'a touch on the brakes', makes it sound like a precise science. Nothing could be further from...
A.
there is a definite relationship between inflation and interest rates
B.
economy will always follow certain models
C.
the economic situation is better than expected
D.
economists had foreseen the present economic situation
【简答题】《颜氏家训》的作者 是 。
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