2023知到答案 生物化学与分子生物学(MBBS)(锦州医科大学) 最新智慧树满分章节测试答案
绪论 单元测试
文章目录
1、多选题:
Biochemistry can be divided into three principal areas, that is:( )
选项:
A:metabolism, the totality of chemical reactions that occur in living matter
B:morphology change
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:study of structure of the Human Body
答案: 【metabolism, the totality of chemical reactions that occur in living matter;
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】
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:12.5g
B:1.565g
C:1.25g
D:3.125g
E:6.25g
答案: 【3.125g】
2、单选题:
Which of the followings is basic AA? ( )
选项:
A:Pro
B:Tyr
C:Glu
D:Lys
E:Met
答案: 【Lys】
3、单选题:
Which of the following about α-helix is not correct:( )
选项:
A:the helix is clockwise
B:one pitch is 0.54nm
C:the helix is right handed
D:3.6 residues per circle
E:the peptide bonds are the major bonds to stabilize the helix
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:pH8.6
B:pH5.6
C:pH4.7
D:pH2.6
E:pH5.0
答案: 【pH8.6】
5、单选题:
Which of the following about protein denaturaion is not correct?( )
选项:
A:the physico-chemical property of protein changed
B:precipitated protein not be sure to be denatured(C)
C:denatured protein must precipitate
D:The spatial structure of protein are destroied
E:the secondary bond of protein are broken
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:260nm
B:280nm
C:340nm
D:300nm
E:200nm
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,D-α-AA
C:D-α-AA
D:D-β-AA
E:L-α-AA
答案: 【L-α-AA】
8、单选题:
Which of the following about protein secondary structure is not correct? ( )
选项:
A:amino acid sequence of protein
B:it did not involve in the conformation of side chain of amnio acid
C:it is local spatial structure of one certain part of peptide chain in protein
D:it is the relative spatial position of skeleton atom on protein main chain
E:it is hydrogen bond that maintain the stability of protein secondary structure
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:all the protein have quaternary structure
D:quaternary structure was essential condition for maintaining the protein biological activity
E:quaternary structure of protein would not sure to be destoried
答案: 【the subunit were polymerized by noncovalent bond】
10、单选题:
α helix of protein structure belongs to( )
选项:
A:secondary structure
B:quaternary structure
C:motif
D:tertiary structure
E:domain
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:stop codon
B:cap sequence
C:initiation codon
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:Various tRNA are present in the cell.
B:The secondary structure of tRNA is cloverleaf structure.
C:tRNA contains rare bases.
D:tRNA is usually composed of 70-90 nucleotides.
E:Anticodon loop contains the anticodon that is composed of three bases CCA.
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:It is usually single-stranded molecule.
C:mRNA contains the genetic codon.
D:tRNA contains more rare bases than other RNAs.
E:RNA contains regional double-stranded structure.
答案: 【rRNA is the place for protein synthesis.】
4、单选题:
Which statement is true for Tm? ( )
选项:
A:Higher AT content, higher Tm
B:is usually RNA
C:Higher GC content,higher Tm.
D:Higher purity of nucleic acid, larger range of Tm
E:Smaller nucleic acid, larger range of Tm.
F:The nucleic acid with higher
答案: 【Higher GC content,higher Tm.】
5、单选题:
The secondary structure of DNA is ( )
选项:
A:double-stranded helix
B:regional double-stranded helix
C:polyA sequence
D:supercoil
E:inverted L shape
答案: 【double-stranded helix】
6、单选题:
The tertiary structure of tRNA is ( )
选项:
A:regional double-stranded helix
B:supercoil
C:polyA sequence
D:inverted L shape
E:double-stranded helix
答案: 【inverted L shape】
7、单选题:
3'-end of mRNA has ( )
选项:
A:supercoil
B:inverted L shape
C:double-stranded helix
D:regional double-stranded helix
E:polyA sequence
答案: 【polyA sequence】
8、单选题:
The RNA that can carry amino acid and transfer it to ribosome is ( )
选项:
A:siRNA
B:tRNA
C:mRNA
D:rRNA
E:hnRNA
答案: 【tRNA】
9、单选题:
The template of protein synthesis is ( )
选项:
A:siRNA
B:tRNA
C:hnRNA
D:mRNA
E:rRNA
答案: 【mRNA】
10、单选题:
DNA can be separated into two single chains during heating ( )
选项:
A:DNA denaturation
B:DNA renaturation
C:Hydrolysis of nucleic acid
D:Dissociation of nucleic acid
E:Hybridization
答案: 【DNA denaturation】
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