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GRE阅读理解(Barron模考)每日一题 第23期
日期:2014-08-20 11:03

(单词翻译:单击)

阅读理解

The interaction and docking of two molecules is the process by which chemical reactions occur on a biological level. One molecule either inserts itself or closely associates itself with another, and the resulting close association of the two molecules facilitates a particular biological function or cascade of events. For example, when long chains of amino acids, or polyproteins, are inserted into a cleft of HIV-1 Protease, the protein cleaves the polyprotein chain into individual components, which then are assembled to form the HIV virus.

Based on the passage, which of the following statements would the author most likely agree with?
A.HIV-1 protease is a wonderful molecule
B.Docking always involves proteins or ligands
C.Viruses are often synthesized in laboratories
D.Cascades of biological events occur only when proteins dock
E.In order for two molecules to dock, several specific events must occur


According to the passage, which of the following is most likely the function of the HIV-1 Protease?
A.To dock to three molecules
B.To interact with all other molecules
C.To bind to four molecules
D.To undergo a 3-dimensional transitions
E.To cleave polyproteins

According to the passage, the author would agree with which of the following statements?
A.In order to understand a biological chemical reaction, you should not consider interactions of molecules.
B.In order to discover new drugs, we need to only understand molecular docking mechanisms.
C.Proteins or ligands rarely associate.
D.A molecule must insert itself into another molecule, so that a chemical reaction can occur.
E.Chemical reactions that involve two biomolecules often include docking and physical interaction of the two molecules.

参考答案

1.正确的答案:E

2.正确的答案:E

3.正确的答案:E

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重点单词
  • interactionn. 相互作用,相互影响,互动交流
  • understandvt. 理解,懂,听说,获悉,将 ... 理解为,认为
  • associaten. 同伴,伙伴,合伙人 n. 准学士学位获得者 vt.
  • moleculen. 分子
  • specificadj. 特殊的,明确的,具有特效的 n. 特效药,特性
  • proteinn. 蛋白质
  • associationn. 联合,结合,交往,协会,社团,联想
  • functionn. 功能,函数,职务,重大聚会 vi. 运行,起作用
  • reactionn. 反应,反作用力,化学反应
  • particularadj. 特殊的,特别的,特定的,挑剔的 n. 个别项目