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Proteins are the agents of biological function. Virtually every cellular activity is dependent on one or more particular proteins. Thus, a convenient way to classify the enormous number of proteins is by the biological roles they fill. By far the largest class of proteins is enzyme. A number of proteins do not perform any obvious chemical transformation but nevertheless regulate the ability of other proteins to carry out their physiological functions. Such proteins are referred to as regulatory proteins. Transport proteins, storage proteins and structural proteins are proteins carry out respective functions.
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参考答案：
举一反三
【单选题】You are a little overweight. I suggest you ______ Rosie's example and start doing regular exercise.
A.
set
B.
copy
C.
follow
D.
give
查看完整题目与答案
【单选题】What does the boy think is also important to young people?
A.
Doing regular checkups to prevent illness that threatens our longevity.
B.
Doing crossword puzzles.
C.
Doing everything in the list.
D.
Doing gardening every day.
查看完整题目与答案
【判断题】计算机的硬件资源和软件资源都是由操作系统管理的。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】分时操作系统是指( )。
A.
多个用户分时使用同一台计算机的某个终端
B.
多道程序分时共享计算机的软硬件资源
C.
操作系统分时接收到每个用户的指令后进行批处理
D.
每个用户都有独立的计算机及终端，任务由分时操作系统提交给服务器
查看完整题目与答案
【单选题】阅读材料，回答题。 What Is Globalization ? It was the anti-globalization movement that really put globalization on the map. As a word it has existed since the 1960s, but the protests against this allegedly new...
A.
Right
B.
Wrong
C.
Not mentioned
查看完整题目与答案
【判断题】对于加入燃料系中柴油的洁净程度要求十分严格,不但加油器具要洁净,而且柴油至少要经过48h的沉淀之后,才能加入油箱中。
A.
正确
B.
错误
查看完整题目与答案
【单选题】刘先生急诊手术后回病区,护士为其准备床单位时正确的方法是
A.
立即将备用床改为暂空床
B.
将盖被三折叠于床尾
C.
橡胶单和中单铺于床尾部
D.
将备用床改为麻醉床
E.
将枕头置于床头,开口朝向门
查看完整题目与答案
【单选题】According to the passage, what was the percentage of American adults doing regular physical exercises two years ago?
A.
About 70%.
B.
Nearly 60%.
C.
Almost 50%.
D.
More than 12%.
查看完整题目与答案
【多选题】Globalization has several facets, including _____________________.
A.
the globalization of markets
B.
the globalization of manufacturing
C.
the globalization of production
D.
the globalization of marketing
查看完整题目与答案
【单选题】下列叙述中,错误的是______。
A.
把数据从内存传输到硬盘的操作称为写盘
B.
WPS.Office.2003属于系统软件
C.
把高级语言源程序转换为等价的机器语言目标程序的过程叫编译
D.
计算机内部对数据的传输存储和处理都使用二进制,系统软件由一组控制计算机系统并管理其资源的程序组成。
查看完整题目与答案
相关题目：
【单选题】You are a little overweight. I suggest you ______ Rosie's example and start doing regular exercise.
A.
set
B.
copy
C.
follow
D.
give
查看完整题目与答案
【单选题】What does the boy think is also important to young people?
A.
Doing regular checkups to prevent illness that threatens our longevity.
B.
Doing crossword puzzles.
C.
Doing everything in the list.
D.
Doing gardening every day.
查看完整题目与答案
【判断题】计算机的硬件资源和软件资源都是由操作系统管理的。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】分时操作系统是指( )。
A.
多个用户分时使用同一台计算机的某个终端
B.
多道程序分时共享计算机的软硬件资源
C.
操作系统分时接收到每个用户的指令后进行批处理
D.
每个用户都有独立的计算机及终端，任务由分时操作系统提交给服务器
查看完整题目与答案
【单选题】阅读材料，回答题。 What Is Globalization ? It was the anti-globalization movement that really put globalization on the map. As a word it has existed since the 1960s, but the protests against this allegedly new...
A.
Right
B.
Wrong
C.
Not mentioned
查看完整题目与答案
【判断题】对于加入燃料系中柴油的洁净程度要求十分严格,不但加油器具要洁净,而且柴油至少要经过48h的沉淀之后,才能加入油箱中。
A.
正确
B.
错误
查看完整题目与答案
【单选题】刘先生急诊手术后回病区,护士为其准备床单位时正确的方法是
A.
立即将备用床改为暂空床
B.
将盖被三折叠于床尾
C.
橡胶单和中单铺于床尾部
D.
将备用床改为麻醉床
E.
将枕头置于床头,开口朝向门
查看完整题目与答案
【单选题】According to the passage, what was the percentage of American adults doing regular physical exercises two years ago?
A.
About 70%.
B.
Nearly 60%.
C.
Almost 50%.
D.
More than 12%.
查看完整题目与答案
【多选题】Globalization has several facets, including _____________________.
A.
the globalization of markets
B.
the globalization of manufacturing
C.
the globalization of production
D.
the globalization of marketing
查看完整题目与答案
【单选题】下列叙述中,错误的是______。
A.
把数据从内存传输到硬盘的操作称为写盘
B.
WPS.Office.2003属于系统软件
C.
把高级语言源程序转换为等价的机器语言目标程序的过程叫编译
D.
计算机内部对数据的传输存储和处理都使用二进制,系统软件由一组控制计算机系统并管理其资源的程序组成。
查看完整题目与答案
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