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

20. Carbohydrates

Polysaccharides

GOB Chemistry

20. Carbohydrates

Polysaccharides

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2:20 minutes

Problem 57b

Textbook Question

Melezitose, a carbohydrate secreted by insects, has the following Haworth structure:

b. What monosaccharides are present in melezitose?

Verified step by step guidance

Understand the problem: The question asks us to identify the monosaccharides present in melezitose based on its Haworth structure. A Haworth structure is a cyclic representation of a carbohydrate, showing the arrangement of atoms in a ring form.

Analyze the structure: Examine the given Haworth structure of melezitose. Look for the characteristic features of monosaccharides, such as the number of carbon atoms, the presence of hydroxyl (-OH) groups, and the type of glycosidic bonds connecting the monosaccharides.

Identify the monosaccharides: Melezitose is a trisaccharide, meaning it is composed of three monosaccharides. Based on the structure, determine the specific monosaccharides present. Common monosaccharides include glucose, fructose, and galactose, which can be identified by their unique structural features.

Check the glycosidic linkages: Observe how the monosaccharides are connected. The type of glycosidic bond (e.g., α-1,4 or β-1,2) can provide additional confirmation of the identity of the monosaccharides.

Summarize the findings: Once the monosaccharides are identified, list them along with any relevant details about their arrangement or bonding in melezitose.

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Key Concepts

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

Haworth Structure

The Haworth structure is a way of representing the cyclic form of carbohydrates, particularly sugars. It illustrates the arrangement of atoms in a sugar molecule, showing how the hydroxyl groups and other substituents are positioned around the ring. Understanding this structure is crucial for identifying the types of monosaccharides that make up disaccharides like melezitose.

Monosaccharides

Monosaccharides are the simplest form of carbohydrates, consisting of single sugar units. Common examples include glucose, fructose, and galactose. In the context of melezitose, recognizing the specific monosaccharides that combine to form this disaccharide is essential for understanding its chemical properties and biological functions.

Disaccharides

Disaccharides are carbohydrates formed by the condensation of two monosaccharides, linked by a glycosidic bond. Melezitose, specifically, is a disaccharide composed of two different monosaccharides. Identifying the monosaccharides in melezitose helps in understanding its structure, sweetness, and role in various biological processes.