绪论 单元测试

1、多选题：
Biochemistry can be divided into three principal areas, that is：（ ）
选项：
A:morphology change
B:study of structure of the Human Body
C:the structural chemistry of the components of living matter and relationships of biological function to chemical structure
D:genetic biochemistry, the chemistry of processes and substances that store and transmit biological information
E:metabolism, the totality of chemical reactions that occur in living matter
答案: 【the structural chemistry of the components of living matter and relationships of biological function to chemical structure;
genetic biochemistry, the chemistry of processes and substances that store and transmit biological information;
metabolism, the totality of chemical reactions that occur in living matter】

第一章 单元测试

1、单选题：
The nitrogen content of one protein sample is 0.5g，and then the protein content of it is ：（ ）
选项：
A:3.125g
B:12.5g
C:6.25g
D:1.565g
E:1.25g
答案: 【3.125g】

2、单选题：
Which of the followings is basic AA? （ ）
选项：
A:Tyr
B:Met
C:Glu
D:Pro
E:Lys
答案: 【Lys】

3、单选题：
Which of the following about α-helix is not correct：（ ）
选项：
A:one pitch is 0.54nm
B:the helix is right handed
C:the peptide bonds are the major bonds to stabilize the helix
D:the helix is clockwise
E:3.6 residues per circle
答案: 【the peptide bonds are the major bonds to stabilize the helix】

4、单选题：
One AA( pI=5.6 ) will be negatively charged in a solution （ ）?
选项：
A:pH2.6
B:pH4.7
C:pH5.6
D:pH5.0
E:pH8.6
答案: 【pH8.6】

5、单选题：
Which of the following about protein denaturaion is not correct?（ ）
选项：
A:The spatial structure of protein are destroied
B:the physico-chemical property of protein changed
C:the secondary bond of protein are broken
D:precipitated protein not be sure to be denatured(C)
E:denatured protein must precipitate
答案: 【denatured protein must precipitate】

6、单选题：
All the common proein absorb light at a wavelength of UV close to （ ） nm?
选项：
A:280nm
B:340nm
C:200nm
D:260nm
E:300nm
答案: 【280nm】

7、单选题：
The amino acid found as constituents of mammalian proteins are all ( ) except for glycine?（ ）
选项：
A:L-β-AA
B:L-α-AA
C:D-α-AA
D:L，D-α-AA
E:D-β-AA
答案: 【L-α-AA】

8、单选题：
Which of the following about protein secondary structure is not correct? （ ）
选项：
A:it did not involve in the conformation of side chain of amnio acid
B:it is the relative spatial position of skeleton atom on protein main chain
C:it is local spatial structure of one certain part of peptide chain in protein
D:it is hydrogen bond that maintain the stability of protein secondary structure
E:amino acid sequence of protein
答案: 【amino acid sequence of protein】

9、单选题：
Which of the following about quaternary structue is correct? （ ）
选项：
A:the stability of protein quaternary structure was maintained by disulfide bond
B:the subunit were polymerized by noncovalent bond
C:quaternary structure of protein would not sure to be destoried
D:all the protein have quaternary structure
E:quaternary structure was essential condition for maintaining the protein biological activity
答案: 【the subunit were polymerized by noncovalent bond】

10、单选题：
α helix of protein structure belongs to（ ）
选项：
A:quaternary structure
B:domain
C:tertiary structure
D:motif
E:secondary structure
答案: 【secondary structure】

第二章 单元测试

1、单选题：
5’-end of the majority of mRNA in eukaryotes has （ ）
选项：
A:initiation codon
B:stop codon
C:cap sequence
D:poly (A) tail
E:CCA-OH
答案: 【cap sequence】

2、单选题：
Which statement is NOT true for tRNA? （ ）
选项：
A:The secondary structure of tRNA is cloverleaf structure.
B:Various tRNA are present in the cell.
C:tRNA is usually composed of 70-90 nucleotides.
D:Anticodon loop contains the anticodon that is composed of three bases CCA.
E:tRNA contains rare bases.
答案: 【Anticodon loop contains the anticodon that is composed of three bases CCA.】

3、单选题：
Which statement is NOT true for RNA? （ ）
选项：
A:rRNA is the place for protein synthesis.
B:mRNA contains the genetic codon.
C:RNA contains regional double-stranded structure.
D:It is usually single-stranded molecule.
E:tRNA contains more rare bases than other RNAs.
答案: 【rRNA is the place for protein synthesis.】

4、单选题：
Which statement is true for Tm? （ ）
选项：
A:The nucleic acid with higher
B:is usually RNA
C:Smaller nucleic acid, larger range of Tm.
D:Higher purity of nucleic acid, larger range of Tm
E:Higher GC content，higher Tm.
F:Higher AT content, higher Tm
答案: 【Higher GC content，higher Tm.】

5、单选题：
The secondary structure of DNA is （ ）
选项：
A:double-stranded helix
B:polyA sequence
C:supercoil
D:inverted L shape
E:regional double-stranded helix
答案: 【double-stranded helix】

6、单选题：
The tertiary structure of tRNA is （ ）
选项：
A:double-stranded helix
B:inverted L shape
C:polyA sequence
D:regional double-stranded helix
E:supercoil
答案: 【inverted L shape】

7、单选题：
3'-end of mRNA has （ ）
选项：
A:double-stranded helix
B:supercoil
C:regional double-stranded helix
D:polyA sequence
E:inverted L shape
答案: 【polyA sequence】

8、单选题：
The RNA that can carry amino acid and transfer it to ribosome is （ ）
选项：
A:rRNA
B:hnRNA
C:siRNA
D:tRNA
E:mRNA
答案: 【tRNA】

9、单选题：
The template of protein synthesis is （ ）
选项：
A:tRNA
B:mRNA
C:hnRNA
D:rRNA
E:siRNA
答案: 【mRNA】

10、单选题：
DNA can be separated into two single chains during heating （ ）
选项：
A:DNA renaturation
B:Hydrolysis of nucleic acid
C:DNA denaturation
D:Dissociation of nucleic acid
E:Hybridization
答案: 【DNA denaturation】

发表评论

电子邮件地址不会被公开。 必填项已用*标注