Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

26. Nucleic Acids and Protein Synthesis

Naming Nucleosides and Nucleotides

GOB Chemistry

26. Nucleic Acids and Protein Synthesis

Naming Nucleosides and Nucleotides

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1:35 minutes

Problem 1

Textbook Question

Name the nucleoside shown here. Copy the structure, and number the C and N atoms (refer to Table 26.1).

Verified step by step guidance

Identify the components of the nucleoside: A nucleoside consists of a nitrogenous base (a purine or pyrimidine) attached to a sugar molecule (ribose or deoxyribose) via a β-N-glycosidic bond. Examine the structure in the image to determine the type of nitrogenous base and sugar present.

Number the carbon (C) atoms in the sugar: For ribose or deoxyribose, start numbering from the carbon attached to the nitrogenous base (this is C1'). Continue numbering the carbons in the sugar clockwise, ending with C5'.

Number the nitrogen (N) and carbon (C) atoms in the nitrogenous base: Refer to Table 26.1 or a standard numbering scheme for purines and pyrimidines. For purines, start numbering at the nitrogen atom in the six-membered ring closest to the sugar. For pyrimidines, start numbering at the nitrogen atom directly bonded to the sugar.

Combine the names of the sugar and the nitrogenous base: Use the name of the nitrogenous base (e.g., adenine, cytosine, guanine, thymine, or uracil) and the type of sugar (ribose or deoxyribose) to name the nucleoside. For example, if the base is adenine and the sugar is ribose, the nucleoside is adenosine.

Verify the structure and naming: Double-check the numbering of atoms and the name of the nucleoside to ensure accuracy. Ensure that the β-N-glycosidic bond is correctly represented in the structure.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Nucleosides

Nucleosides are organic molecules composed of a nitrogenous base attached to a sugar molecule, specifically ribose or deoxyribose. They are fundamental building blocks of nucleic acids, such as DNA and RNA. Understanding the structure of nucleosides is crucial for identifying them, as the specific arrangement of atoms and functional groups determines their classification and function.

Numbering of Atoms

In organic chemistry, numbering atoms in a molecular structure is essential for clear communication and understanding of the compound's configuration. For nucleosides, the carbon (C) and nitrogen (N) atoms are typically numbered in a specific order, which helps in identifying the position of functional groups and understanding the molecule's reactivity. This systematic approach is vital for accurately describing the structure and for referencing in scientific literature.

Structural Representation

Structural representation refers to the way a molecule is depicted, showing the arrangement of atoms and the bonds between them. In the context of nucleosides, this includes the depiction of the sugar and base components, as well as the specific connectivity of atoms. Accurately copying and numbering the structure is important for identifying the nucleoside and for further studies in biochemistry and molecular biology.

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