有机化学

The core task of this step is to select an important class of biomolecules and systematically analyze their structural features and chemical properties. Choose from carbohydrates, lipids, amino acids/proteins, or nucleic acids for in-depth study, understanding structure-function relationships.

• Select one class from carbohydrates (monosaccharides, oligosaccharides, polysaccharides), lipids (fatty acids, triglycerides, phospholipids, sterols), amino acids & proteins, or nucleic acids (DNA, RNA); define specific research object (e.g., glucose, lecithin, insulin, DNA double helix)
• Structural feature analysis: analyze functional groups, chiral centers, stereochemistry (D/L configuration, α/β anomers), glycosidic/peptide/phosphodiester bond types, higher-order structures (secondary, tertiary, quaternary)
• Review literature on biological functions, cellular distribution, and metabolic pathways of this biomolecule class; write structural analysis report

The core task of this step is to deeply analyze organic reaction mechanisms related to selected biomolecules and understand the organic chemistry nature of biological chemical reactions. Apply fundamental organic chemistry principles to explain metabolic transformations and functional mechanisms.

• Select 2-3 key bioorganic reactions: e.g., sugar oxidative degradation, fatty acid β-oxidation, transamination, peptide bond formation, phosphodiester bond formation in DNA replication
• Reaction mechanism analysis: use curved arrows for electron transfer; identify reaction types (SN1/SN2, nucleophilic addition-elimination, redox, etc.); identify key intermediates (enolates, tetrahedral intermediates, imines, etc.)
• Enzyme catalytic mechanism analysis: discuss how enzymes accelerate reactions through acid-base catalysis, covalent catalysis, metal ion catalysis; analyze roles of active site amino acid residues

The core task of this step is to design chemical experiments to verify structural features and chemical properties of biomolecules. Based on functional group characteristics, select appropriate qualitative and quantitative analytical methods and design complete experimental protocols.

• Qualitative identification experiment design: select characteristic reactions based on functional groups (e.g., Fehling's reaction for reducing sugars, iodine reaction for starch, biuret reaction for proteins, ninhydrin reaction for amino acids); design procedures and expected phenomena
• Quantitative determination experiment design: choose colorimetric, titrimetric, or spectrophotometric methods; design complete workflow including standard curve preparation, sample measurement, and calculation methods
• List required reagents (Fehling's reagent, iodine-potassium iodide solution, biuret reagent, ninhydrin reagent, etc.), equipment (visible spectrophotometer, thermostatic water bath, centrifuge), and safety precautions

The core task of this step is to comprehensively analyze the in vivo chemical behavior of biomolecules, including metabolic pathway transformations, interactions with other molecules, and changes in physiological/pathological processes. Connect organic chemistry knowledge with biological functions.

• Metabolic pathway analysis: trace biosynthesis and degradation pathways of the biomolecule in cells; identify key reaction steps and enzymes; classify reaction types by organic chemistry
• Molecular interaction analysis: discuss interaction modes with proteins, nucleic acids, membrane lipids (hydrogen bonds, hydrophobic interactions, ionic bonds, van der Waals forces); analyze structural complementarity
• Pathological change analysis: select a related disease (e.g., diabetes with glucose metabolism abnormality, hyperlipidemia with lipid metabolism disorder, gout with purine metabolism abnormality); analyze relationship between biomolecule chemical property changes and disease

The core task of this step is to write a complete research report systematically presenting biomolecule structure analysis, reaction mechanisms, chemical properties, and in vivo behavior. The report should demonstrate application of organic chemistry principles in biomedicine.

• Write research report following academic standards: abstract, introduction, biomolecule structure analysis, organic reaction mechanisms, chemical property experiment design, in vivo chemical behavior analysis, discussion and conclusion, references; minimum 3000 words
• Create high-quality chemical structure diagrams: use ChemDraw to draw molecular structures, reaction schemes, mechanism diagrams, metabolic pathway diagrams; accurate stereochemistry representation; clear figure captions
• Summary and outlook: summarize organic chemical characteristics of this biomolecule class; discuss research progress and future directions of bioorganic chemistry; connect to pharmaceutical application prospects

The core task of this step is to select an important class of biomolecules and systematically analyze their structural features and chemical properties. Choose from carbohydrates, lipids, amino acids/proteins, or nucleic acids for in-depth study, understanding structure-function relationships. The structural features of biomolecules determine their chemical behavior and biological functions in vivo.

• Select one class from carbohydrates (monosaccharides, oligosaccharides, polysaccharides), lipids (fatty acids, triglycerides, phospholipids, sterols), amino acids & proteins, or nucleic acids (DNA, RNA); define specific research object (e.g., glucose, lecithin, insulin, DNA double helix)
• Structural feature analysis: analyze functional groups, chiral centers, stereochemistry (D/L configuration, α/β anomers), glycosidic/peptide/phosphodiester bond types, higher-order structures (secondary, tertiary, quaternary)
• Review literature on biological functions, cellular distribution, and metabolic pathways of this biomolecule class; write structural analysis report

The core task of this step is to deeply analyze organic reaction mechanisms related to selected biomolecules and understand the organic chemistry nature of biological chemical reactions. Apply fundamental organic chemistry principles (nucleophilic substitution, electrophilic addition, elimination, redox, etc.) to explain metabolic transformations and functional mechanisms. Enzyme-catalyzed reactions are central to bioorganic chemistry.

• Select 2-3 key bioorganic reactions: e.g., sugar oxidative degradation, fatty acid β-oxidation, transamination, peptide bond formation, phosphodiester bond formation in DNA replication
• Reaction mechanism analysis: use curved arrows for electron transfer; identify reaction types (SN1/SN2, nucleophilic addition-elimination, redox, etc.); identify key intermediates (enolates, tetrahedral intermediates, imines, etc.)
• Enzyme catalytic mechanism analysis: discuss how enzymes accelerate reactions through acid-base catalysis, covalent catalysis, metal ion catalysis; analyze roles of active site amino acid residues

The core task of this step is to design chemical experiments to verify structural features and chemical properties of biomolecules. Based on functional group characteristics, select appropriate qualitative and quantitative analytical methods and design complete experimental protocols. Experimental design should demonstrate application of organic chemistry principles in biomolecule analysis.

• Qualitative identification experiment design: select characteristic reactions based on functional groups (e.g., Fehling's reaction for reducing sugars, iodine reaction for starch, biuret reaction for proteins, ninhydrin reaction for amino acids); design procedures and expected phenomena
• Quantitative determination experiment design: choose colorimetric, titrimetric, or spectrophotometric methods; design complete workflow including standard curve preparation, sample measurement, and calculation methods
• List required reagents (Fehling's reagent, iodine-potassium iodide solution, biuret reagent, ninhydrin reagent, etc.), equipment (visible spectrophotometer, thermostatic water bath, centrifuge), and safety precautions

The core task of this step is to comprehensively analyze the in vivo chemical behavior of biomolecules, including metabolic pathway transformations, interactions with other molecules, and changes in physiological/pathological processes. Connect organic chemistry knowledge with biological functions to understand the chemical essence of life processes at the molecular level.

• Metabolic pathway analysis: trace biosynthesis and degradation pathways of the biomolecule in cells; identify key reaction steps and enzymes; classify reaction types by organic chemistry
• Molecular interaction analysis: discuss interaction modes with proteins, nucleic acids, membrane lipids (hydrogen bonds, hydrophobic interactions, ionic bonds, van der Waals forces); analyze structural complementarity
• Pathological change analysis: select a related disease (e.g., diabetes with glucose metabolism abnormality, hyperlipidemia with lipid metabolism disorder, gout with purine metabolism abnormality); analyze relationship between biomolecule chemical property changes and disease

The core task of this step is to write a complete research report systematically presenting biomolecule structure analysis, reaction mechanisms, chemical properties, and in vivo behavior. The report should demonstrate application of organic chemistry principles in biomedicine and the ability to understand life phenomena at the molecular level. Report writing is comprehensive training in scientific thinking and communication.

• Write research report following academic standards: abstract, introduction, biomolecule structure analysis, organic reaction mechanisms, chemical property experiment design, in vivo chemical behavior analysis, discussion and conclusion, references; minimum 3000 words
• Create high-quality chemical structure diagrams: use ChemDraw to draw molecular structures, reaction schemes, mechanism diagrams, metabolic pathway diagrams; accurate stereochemistry representation; clear figure captions
• Summary and outlook: summarize organic chemical characteristics of this biomolecule class; discuss research progress and future directions of bioorganic chemistry; connect to pharmaceutical application prospects

Select a biomolecule class as research subject

Analyze stereochemistry, functional groups, and configuration

Analyze mechanism and stereochemistry of reactions

Discuss significance of reactions in vivo

Compile analysis and write complete report