第二章. 核酸的结构与功能（The second chapter is the structure and function of nucleic acid）.docVIP

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第二章. 核酸的结构与功能（The second chapter is the structure and function of nucleic acid）.doc

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第二章. 核酸的结构与功能（The second chapter is the structure and function of nucleic acid）

第二章. 核酸的结构与功能（The second chapter is the structure and function of nucleic acid） The second chapter is the structure and function of nucleic acid This chapter focuses on Chemical composition of nucleic acids Base components in 1. nucleotides 2. pentose and nucleoside Structure and nomenclature of 3. nucleotides Two. The primary structure of nucleic acid Primary structure of 1.DNA and RNA The difference between 2.RNA and DNA The spatial structure and function of three and DNA Two stage structure of 1.DNA -- double helix structure model Background: the double helix structure of DNA The main points of the DNA double helix model Diversity of 2.DNA structures The super helix structure of 3.DNA Assembly of 4.DNA in eukaryotic cells The function of 5.DNA The spatial structure and function of four and RNA Structure and function of 1. messenger RNA 2. translocation RNA structure and function Structure and function of 3. nuclear protein RNA 4. other small molecules RNA 5. ribozyme Five. The physical and chemical properties of nucleic acids and their applications 1. general physical and chemical properties of nucleic acids Denaturation of 2.DNA Renaturation and molecular hybridization of 3.DNA Exercises First, the multiple-choice question 1. rare nucleotides mainly exist in which of the following nucleic acids? A.rRNA, B.mRNA, C.tRNA, D., nucleus, DNA, E., mitochondria, DNA 2. in nucleic acids, the connection between nucleotides is A.2 , 3 - phosphoric acid two ester bond B.3 , 5 - phosphoric acid two ester bond C.2 , 5 - phosphoric acid, two ester bond, D. glycosidic bond, E. hydrogen bond 3. the base composition ratios of the following DNA molecules vary. Which DNA has the lowest Tm? A+T content in A.DNA accounted for 15%, B.DNA content in G+C accounted for 25% G+C content in C.DNA accounted for 40%, D.DNA content in A+T accounted for 40% G+C content in E.DNA accounts for 70% 4. the beaded core proteins of nucleosomes are A. non histone proteins B.H2A, H2B, H3, H4 each molecu