绪论 单元测试

1、 问题:Approximately what percentage of the human genome encodes for proteins?（ ）
选项：
A:50%
B:90%
C:10%
D:3%
答案: 【
3%
】

第一章 单元测试

1、 问题:All of the following amino acids are acidic or basic amino acids, EXCEPT（ ）.
选项：
A:Asp
B:Glu
C:Lys
D:Ser
答案: 【
Ser
】

2、 问题:The amino acids that determine the UV-absorbing properties of proteins are（ ）.
选项：
A:Histidine, Proline, Phenylalanine
B:Tryptophan, Phenylalanine, Tyrosine
C:Phenylalanine, Proline, Tyrosine
D:Histidine, Tryptophan, Phenylalanine
答案: 【
Tryptophan, Phenylalanine, Tyrosine
】

3、 问题:The protein molecule (PI=4.5) will mobile to the negative electrode when the PH of electrophoresis buffer is（ ）.
选项：
A:PH=3.0
B:PH=4.5
C:PH=5.0
D:PH=7.0
答案: 【
PH=3.0
】

4、 问题: Gel filtration chromatography is a method that can be used to separate and purify proteins, basing on the solubility of proteins（ ）
选项：
A:对
B:错
答案: 【
错
】

第二章 单元测试

1、 问题:The correct description about measuring DNA denaturation are included, EXCEPT（ ）.
选项：
A:Decreased viscosity
B:Increased buoyant density
C:Hypochromic effect
D:Loss of the biological activity
答案: 【
Hypochromic effect
】

2、 问题:Northern hybridization is used to detect（ ）.
选项：
A:DNA
B:RNA
C:Protein
D:Carbohydrate
答案: 【
RNA
】

3、 问题: The sedimentation coefficient of the mammalian ribosome large subunit is 50S.（ ）
选项：
A:对
B:错
答案: 【
错
】

4、 问题:【填空题】Each nucleotide consists of three components, ，，___.
答案: 【
pentose
Nitrogen-containing base
Phosphate group
】

第三章 单元测试

1、 问题:About competitive inhibitors, which one is true?（ ）.
选项：
A:Km increases, Vmax remains constant
B:Km decreases, Vmax decreases
C:Km remains constant, Vmax decreases
D:Km decreases, Vmax remains constant
答案: 【
Km increases, Vmax remains constant
】

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