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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1:40 minutes

Problem 49b

Textbook Question

Give the name of one or more polysaccharides that matches each of the following descriptions:
b. the storage form of carbohydrates in plants

Verified step by step guidance

Understand the problem: The question asks for the name of a polysaccharide that serves as the storage form of carbohydrates in plants. Polysaccharides are long chains of monosaccharides linked by glycosidic bonds.

Recall the key concept: Plants store carbohydrates in the form of a specific polysaccharide that is composed of glucose units. This polysaccharide is used as an energy reserve.

Identify the polysaccharide: The storage form of carbohydrates in plants is primarily **starch**, which consists of two components: amylose (a linear chain of glucose molecules) and amylopectin (a branched chain of glucose molecules).

Relate the structure to its function: Starch is an efficient storage molecule because it is compact and can be broken down into glucose when the plant needs energy.

Conclude the answer: The polysaccharide that matches the description is starch, specifically its components amylose and amylopectin.

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Key Concepts

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

Polysaccharides

Polysaccharides are large, complex carbohydrates composed of long chains of monosaccharide units. They serve various functions in living organisms, including energy storage and structural support. Common examples include starch, glycogen, and cellulose, each playing distinct roles in biological processes.

Starch

Starch is a polysaccharide that serves as the primary storage form of carbohydrates in plants. It is composed of two types of molecules: amylose and amylopectin. Starch is found in high concentrations in plant tissues such as tubers and seeds, providing energy for growth and development.

Carbohydrate Storage

Carbohydrate storage refers to the way organisms store excess glucose for later use. In plants, this is primarily achieved through the synthesis of starch, which can be broken down into glucose when energy is needed. This process is crucial for maintaining energy balance and supporting metabolic functions.