第六章单元测试
- In general, the amino acids which will create the active site for an enzyme are in close proximity to each other in the primary amino acid sequence. （ ）
- Phosphorylation, acetylation, and ubiquitination are permanent protein modifications. （ ）
- There are three models to describe the specificity of an enzyme binding to its substrate. What are they?（ ）
- Which factor(s) affect the rate of an enzymatic reaction?（ ）
- Which of the following statements about Km are true?（ ）
A:错 B:对
答案:错
A:错 B:对
A:The Induced fit model B:The Lock and Key model C:The three-point attachment model D:The four-point attachment model
A:substrate concentration B:enzyme concentration C:the presence or absence of inhibitors and activators D:reaction temperature E:pH and ionic strength of the reaction medium
A:Km can approximate the affinity of the enzyme to the substrate B:Km is one of the characteristic constants of enzymes C:The substrate concentration at which the initial velocity (V0) is half maximal. D:the same enzyme can have different Km values for different substrates
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