2021 Basic Biochemistry(Northwest A&F University) 最新满分章节测试答案

文章目录[隐藏]

Chapter 1 Introduction Test for Chapter 1
Chapter 2 Structure and Function of Nucleic Acid Test for Chapter 2
Chapter 3 Protein Structure and Function Test for Chapter 3
Chapter 4 Enzymology Test for Chapter 4
Chapter 5 Lipids and biofilms Test for Chapter 5
Chapter 6 Introduction to metabolism Test for Chapter 6
Chapter 7 Carbohydrate catabolism Test for Chapter 7
Chapter 8 Biological Oxidation and Oxidative Phosphorylation Test for Chapter 8
Chapter 9 Biosynthesis of sugar Test for Chapter 9
Chapter 10 Lipid metabolism Test for Chapter 10
Chapter 11 Enzymatic degradation of proteins and amino acid metabolism Test for Chapter 11
Chapter 13 Enzymatic degradation of nucleic acids and nucleotide metabolism Test for Chapter 13
Chapter 12 Assimilation of ammonia and biosynthetic of amino acids Test for Chapter 12
Chapter 14 Biosynthesis of Nucleic Acids Test for Chapter 14
Chapter 16 Cell metabolic networks and gene expression regulation Test for Chapter 16
Chapter 15 Biosynthesis of Proteins Test for Chapter 15

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-03-12到2021-06-25

Chapter 1 Introduction Test for Chapter 1

1、问题:Which of the following is not a polymer?
选项：
A:Protein
B: DNA
C:Phospholipid
D: Starch
答案: 【Phospholipid】

2、问题:Which of the following statements about the biochemistry is correct?
选项：
A:Biochemistry is an interdisciplinary subject of chemistry and biology.
B:Biochemistry studies the chemical composition of organisms.
C:Biochemistry studies various chemical changes that drive the movement of life.
D:Biochemistry and Molecular Biology are closely related and overlap in part.
答案: 【Biochemistry is an interdisciplinary subject of chemistry and biology.;
Biochemistry studies the chemical composition of organisms.;
Biochemistry studies various chemical changes that drive the movement of life.;
Biochemistry and Molecular Biology are closely related and overlap in part.】

3、问题:The main contents of the biochemistry course include:
选项：
A:Chemical composition of organisms
B:Metabolism of substance and energy
C:Information metabolism
D:Laws of genetics
答案: 【Chemical composition of organisms;
Metabolism of substance and energy;
Information metabolism】

Chapter 2 Structure and Function of Nucleic Acid Test for Chapter 2

1、问题:After the complete hydrolysis of DNA and RNA, the characteristics of its products are:
选项：
A:Different pentoses and different bases.
B:Different pentoses and the same bases.
C:The same pentose and the same base.
D:The same pentose and different base.
答案: 【Different pentoses and different bases.】

2、问题:The connection between nucleotides in nucleic acid molecules is:
选项：
A:3′,3′,-phosphodiester bond.
B:Glycosidic bond.
C:3′,5′-phosphodiester bond.
D:Peptide bond.
答案: 【3′,5′-phosphodiester bond.】

3、问题:The key parts of storing and transmitting genetic information in nucleic acid molecules are:
选项：
A:Nucleoside
B:Pentose
C:Phosphate
D:Base sequence
答案: 【Base sequence】

4、问题:The secondary structure of DNA refers to:
选项：
A:α-helix
B:β-sheet
C:β-turn
D:Double helix structure
答案: 【Double helix structure】

5、问题:Which of the following nucleic acids has a "clover" type secondary structure?
选项：
A:mRNA
B:Plasmid DNA
C:tRNA
D:Mitochondrial DNA
答案: 【tRNA 】

6、问题: After double-stranded DNA thermal denaturation
选项：
A:Decrease in viscosity
B:Decrease in sedimentation coefficient
C:Decrease in buoyancy density
D:Decrease in UV absorption
答案: 【Decrease in viscosity】

7、问题:The higher DNA Tm value is due to the higher nucleotide content of the following group?
选项：
A:G+A
B:C+G
C:A+T
D:C+T
答案: 【C+G】

8、问题:The main force that maintains the stability of the DNA double helix is
选项：
A:Hydrogen bond
B:Ionic bond
C:Base accumulation force
D:Van der Waals
答案: 【Base accumulation force】

9、问题:A pure double-stranded DNA sample contains 15% A, and the content of G in this sample is
选项：
A:35%
B:15%
C:30%
D:20%
答案: 【35% 】

10、问题:According to the Watson-Crick model, the average number of nucleotide pairs per micron DNA double helix is:
选项：
A:25400
B:2540
C:29411
D:2941
答案: 【2941】

11、问题:The main force that maintains the stability of the DNA double helix is
选项：
A:Hydrogen bond
B:Ionic bond
C:Base accumulation force
D:Van der Waal
答案: 【Base accumulation force】

12、问题:Which of the following statements about the Watson-Crick DNA double helix structure model is wrong?
选项：
A:The direction of the two single chains is anti-parallel
B:Base A and G pair
C:Covalent bonding between bases
D:The pentose phosphate backbone is located inside the double helix.
答案: 【Base A and G pair;
Covalent bonding between bases;
The pentose phosphate backbone is located inside the double helix.】

13、问题:Which of the following statements about nucleic acids is correct:
选项：
A:DNA is the carrier of genetic material, responsible for the storage, transmission and release of genetic information; RNA is responsible for the expression of genetic information.
B:Nucleic acid mainly exists in the nucleus
C:Nucleic acid is divided into DNA and RNA.
D:All organisms contain both DNA and RNA nucleic acids.
答案: 【DNA is the carrier of genetic material, responsible for the storage, transmission and release of genetic information; RNA is responsible for the expression of genetic information.;
Nucleic acid mainly exists in the nucleus;
Nucleic acid is divided into DNA and RNA.】

14、问题:Regarding the type and distribution of RNA, which of the following statements is correct ( )
选项：
A:RNA is mainly found in the nucleus.
B:mRNA accounts for about 5% of the total RNA of the cell and serves as a template in protein synthesis
C:rRNA accounts for 80% of the total RNA of the cell, is a component of the ribosome, and is a place for protein synthesis.
D:tRNA accounts for 10-15% of the total RNA of the cell, and plays the role of carrying activated amino acids in protein synthesis.
答案: 【mRNA accounts for about 5% of the total RNA of the cell and serves as a template in protein synthesis;
rRNA accounts for 80% of the total RNA of the cell, is a component of the ribosome, and is a place for protein synthesis.;
tRNA accounts for 10-15% of the total RNA of the cell, and plays the role of carrying activated amino acids in protein synthesis.】

15、问题: Which of the following statements is wrong
选项：
A: Z-DNA segment exists in the natural DNA molecule.
B:The interaction between B-DNA and Z-DNA may be related to gene regulation.
C: A-DNA, B-DNA, C-DNA and Z-DNA are all right-handed helices.
D:Z-DNA axis passes through base pairs
答案: 【The interaction between B-DNA and Z-DNA may be related to gene regulation.;
Z-DNA axis passes through base pairs】

16、问题:The products produced by the complete hydrolysis of nucleic acids are
选项：
A:Base
B:Ribose
C:Phosphoric acid
D:Nucleotide
答案: 【Base;
Ribose;
Phosphoric acid】

17、问题:Which of the following statements are correct
选项：
A:Nucleic acid molecule is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus
B:The base composition of DNA and RNA differs in the composition of pyrimidines.
C:Contains a small amount of other unusual bases in DNA and RNA molecules, called rare bases. Most of them are methylated derivatives of common bases.
D:Dehydration between base and ribose or deoxyribose through condensation of glycosidic bond to form nucleoside or deoxynucleoside.
答案: 【The base composition of DNA and RNA differs in the composition of pyrimidines.;
Contains a small amount of other unusual bases in DNA and RNA molecules, called rare bases. Most of them are methylated derivatives of common bases.;
Dehydration between base and ribose or deoxyribose through condensation of glycosidic bond to form nucleoside or deoxynucleoside.】

18、问题:8 Which of the following related statements is correct
选项：
A:The 1st carbon atom of pentose is connected to the 9th nitrogen atom of purine to form a l,9-glycosidic bond.
B:Dehydration between the free hydroxyl group of pentose sugar in nucleoside and phosphoric acid generates nucleotides through condensation of phosphoester bond
C:Both deoxyribonucleoside and ribonucleoside can form 2′-3′- or 5′-ribonucleotide
D:5′-nucleotides are mostly free in organisms.