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Which nitrogenous base is present in but not in ?
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- 1. A Review of General Chemistry6h 57m
- Orgo 1: Pre-Course Review25m
- What is Organic Chemistry?10m
- Atomic Structure24m
- Wave Function9m
- Molecular Orbital Theory25m
- Sigma and Pi Bonds19m
- Octet Rule25m
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- Formal Charges11m
- Skeletal Structure19m
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- Condensed Structural Formula22m
- Index of Hydrogen Deficiency (Structural)30m
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- Molecular Geometry18m
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- 2. Molecular Representations2h 3m
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- Naming Cycloalkanes10m
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- 5. Chirality5h 36m
- Types of Isomers21m
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- Chirality Test 1 - Internal Line of Symmetry16m
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- Cahn-Ingold-Prelog Nomenclature1h 2m
- Types of Stereoisomers18m
- Atropisomers24m
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- Chirality Test 3 - Disubstituted Cycloalkanes Shortcuts30m
- Isometric Relationships22m
- Fischer Projection10m
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- Optical Activity5m
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- 6. Thermodynamics and Kinetics1h 43m
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- General Mechanism – Addition Reaction9m
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- 11. Radical Reactions2h 57m
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- 16. Conjugated Systems6h 41m
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- Review of Nitriles46m
- 23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
- 24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 50m
- Tautomerization9m
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- Beta-Dicarbonyl Synthesis Pathway7m
- Acetoacetic Ester Synthesis13m
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- 25. Condensation Chemistry2h 9m
- 26. Amines1h 43m
- 27. Heterocycles2h 0m
- Nomenclature of Heterocycles15m
- Acid-Base Properties of Nitrogen Heterocycles10m
- Reactions of Pyrrole, Furan, and Thiophene13m
- Directing Effects in Substituted Pyrroles, Furans, and Thiophenes16m
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- 28. Carbohydrates5h 54m
- Monosaccharide20m
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- Disaccharide30m
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- 29. Amino Acids4h 16m
- Proteins and Amino Acids19m
- L and D Amino Acids14m
- Polar Amino Acids14m
- Amino Acid Chart1h 14m
- Acid-Base Properties of Amino Acids33m
- Isoelectric Point14m
- Amino Acid Synthesis: HVZ Method12m
- Synthesis of Amino Acids: Acetamidomalonic Ester Synthesis16m
- Synthesis of Amino Acids: N-Phthalimidomalonic Ester Synthesis13m
- Synthesis of Amino Acids: Strecker Synthesis13m
- Reactions of Amino Acids: Esterification7m
- Reactions of Amino Acids: Acylation3m
- Reactions of Amino Acids: Hydrogenolysis6m
- Reactions of Amino Acids: Ninhydrin Test11m
- 30. Peptides and Proteins2h 42m
- Peptides12m
- Primary Protein Structure4m
- Secondary Protein Structure17m
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- Quaternary Protein Structure10m
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- Intro to Peptide Sequencing2m
- Peptide Sequencing: Partial Hydrolysis25m
- Peptide Sequencing: Partial Hydrolysis with Cyanogen Bromide7m
- Peptide Sequencing: Edman Degradation28m
- Merrifield Solid-Phase Peptide Synthesis18m
- 31. Catalysis in Organic Reactions1h 30m
- 32. Lipids 2h 50m
- 33. The Organic Chemistry of Metabolic Pathways2h 52m
- Intro to Metabolism6m
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- Intro to Citric Acid Cycle7m
- Structures of the Citric Acid Cycle19m
- The Citric Acid Cycle35m
- 34. Nucleic Acids1h 32m
- 35. Transition Metals6h 14m
- Electron Configuration of Elements45m
- Coordination Complexes20m
- Ligands24m
- Electron Counting10m
- The 18 and 16 Electron Rule13m
- Cross-Coupling General Reactions40m
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- Buchwald-Hartwig Amination Reaction19m
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- Catalytic Allylic Alkylation18m
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- 36. Synthetic Polymers1h 49m
- Introduction to Polymers6m
- Chain-Growth Polymers10m
- Radical Polymerization15m
- Cationic Polymerization8m
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- Polymer Stereochemistry3m
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- Copolymers6m
- Step-Growth Polymers11m
- Step-Growth Polymers: Urethane6m
- Step-Growth Polymers: Polyurethane Mechanism10m
- Step-Growth Polymers: Epoxy Resin8m
- Polymers Structure and Properties8m
34. Nucleic Acids
Nitrogenous Bases
Scelta multipla
Which of the following nitrogenous bases are classified as ?
A
B
C
D
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Guida verificata passo dopo passo1
Understand the classification of nitrogenous bases: Nitrogenous bases are divided into two categories, purines and pyrimidines. Purines have a two-ring structure, while pyrimidines have a single-ring structure.
Identify the pyrimidines: The pyrimidines in DNA and RNA are cytosine, thymine, and uracil. In DNA, thymine is present, while in RNA, uracil replaces thymine.
Recognize the purines: Adenine and guanine are purines, characterized by their double-ring structure.
Apply this knowledge to the given options: From the list provided, cytosine and thymine are pyrimidines, while adenine and guanine are purines.
Conclude the classification: Based on the structural differences, cytosine and thymine are the correct answers for pyrimidines in the given options.
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