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ChemistryChemistry for Today: General, Organic, and Biochemistry9th Edition
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What is the basis for deciding if a substance is a lipid?

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Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
Publisher: Cengage Learning
ISBN: 9781305960060

Solutions

Chapter
Section
Problem 18.1E
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Problem 18.79E
Problem 18.80E
Problem 18.81E
Problem 18.82E
Problem 18.83E
Problem 18.84E
Problem 18.85E
BuyFindarrow_forward

Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
Publisher: Cengage Learning
ISBN: 9781305960060
Chapter 18, Problem 18.1E
Textbook Problem
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What is the basis for deciding if a substance is a lipid?

Interpretation Introduction

Interpretation:

The basis for the decision that a substance is a lipid is to be stated.

Concept introduction:

Lipids are organic compounds which are fatty acids or the derivatives of fatty acids. They are insoluble in water but are soluble in non-polar organic solvents. They include natural oils, waxes, and steroids. Lipids are present in the cell membrane of the living cell.

Answer to Problem 18.1E

When a biological substance is greasy, waxy, oily and insoluble in water, then the substance is considered as a lipid.

Explanation of Solution

Lipids are one of those macromolecular substances that are present in the living cell. Lipid composes the cell membrane of the living cell. The lipids have a greasy, waxy and oily texture. The lipids are insoluble in water. Therefore, it can be easily decided that a substance is a lipid or not by checking these characteristics of lipid.

Conclusion

When a biological substance is greasy, waxy, oily and insoluble in water, then the substance is considered as a lipid.

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Chemistry for Today: General, Organic, and Biochemistry
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Ch. 18 - What is the basis for deciding if a substance is a...Ch. 18 - List two major functions of lipids in the human...Ch. 18 - What functional group is common to all...Ch. 18 - Classify the following as saponifiable or...Ch. 18 - Draw the structure of a typical saturated fatty...Ch. 18 - Describe four structural characteristics exhibited...Ch. 18 - Describe the structure of a micelle formed by the...Ch. 18 - Name two essential fatty acids, and explain why...Ch. 18 - Indicate whether each of the following fatty acids...Ch. 18 - Explain why the melting points of unsaturated...
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