Chemistry for Today: General, Orga...

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



Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
Publisher: Cengage Learning
ISBN: 9781305960060
Chapter 18, Problem 18.1E
Textbook Problem

What is the basis for deciding if a substance is a lipid?

Interpretation Introduction


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.


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

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 18 Solutions

Chemistry for Today: General, Organic, and Biochemistry
Show all chapter solutions
Ch. 18 - What structural feature of a fatty acid is...Ch. 18 - How are fats and oils structurally similar? How...Ch. 18 - From Figure 18.7, arrange the following substances...Ch. 18 - Draw the structure of a triglyceride that contains...Ch. 18 - From what general source do triglycerides tend to...Ch. 18 - The percentage of fatty acid composition of two...Ch. 18 - Why is the amount of saturated fat in the diet a...Ch. 18 - What process is used to prepare a number of useful...Ch. 18 - Write equations for the following reaction using...Ch. 18 - Why is the hydrogenation of vegetable oils of...Ch. 18 - In general terms, name the products of the...Ch. 18 - Write reactions to show how each of the following...Ch. 18 - Draw the structure of a wax formed from oleic acid...Ch. 18 - Like fats, waxes are esters of long-chain fatty...Ch. 18 - Draw the structure of a wax formed from stearic...Ch. 18 - What role do waxes play in nature?Ch. 18 - How do phosphoglycerides differ structurally from...Ch. 18 - Draw the general block diagram structure of a...Ch. 18 - Draw the structure of a phosphoglyceride...Ch. 18 - Describe two biological roles served by the...Ch. 18 - Draw the structure of a lecithin. What structural...Ch. 18 - What is the structural difference between a...Ch. 18 - Where are cephalins found in the human body?Ch. 18 - Draw the general block diagram structure of a...Ch. 18 - List two structural differences between...Ch. 18 - List three diseases caused by abnormal metabolism...Ch. 18 - Describe the structural similarities and...Ch. 18 - Give another name for glycolipids. In what tissues...Ch. 18 - Where would you find membranes in a prokaryotic...Ch. 18 - What three classes of lipids are found in...Ch. 18 - How does the polarity of the phosphoglycerides...Ch. 18 - Describes the major features of the fluid-mosaic...Ch. 18 - Why is it suggested that some people restrict...Ch. 18 - Draw the characteristic chemical structure that...Ch. 18 - Explain how bile salts aid in the digestion of...Ch. 18 - List three important groups of compounds the body...Ch. 18 - What symptoms might indicate the presence of...Ch. 18 - What is the major component in gallstones?Ch. 18 - What is a hormone? What are the two major...Ch. 18 - Name the two groups of adrenocorticoid hormones,...Ch. 18 - How are testosterone and progesterone structurally...Ch. 18 - Name the primary male sex hormone and the three...Ch. 18 - Why do athletes use anabolic steroids? What side...Ch. 18 - What role do the estrogens and progesterone serve...Ch. 18 - What structural features characterize the...Ch. 18 - What compound serves as a starting material for...Ch. 18 - What body processes appear to be regulated in part...Ch. 18 - Name three therapeutic uses of prostaglandins.Ch. 18 - Unsaturated fatty acids are susceptible to...Ch. 18 - A red-brown solution of bromine (Br2) was added to...Ch. 18 - Which of the following waxes would have the lowest...Ch. 18 - Suggest a reason why complex lipids, such as...Ch. 18 - Many esters are pleasantly fragrant. Examples...Ch. 18 - Gasoline is soluble in nonpolar solvents. Why is...Ch. 18 - The structure of cellular membranes is such that...Ch. 18 - In Figure 18.7, the five vegetable oils listed are...Ch. 18 - Answer the question asked in Figure 18.9. How do...Ch. 18 - Why doesnt honey dissolve beeswax?Ch. 18 - In Figure 18.5 where the nonpolar tails are...Ch. 18 - Why are there so many structurally different kinds...Ch. 18 - In what ways are the structural features of...Ch. 18 - When a doughnut is placed on a napkin, the napkin...Ch. 18 - Fats belong to the class of organic compounds...Ch. 18 - Identify each of the following characteristics as...Ch. 18 - Identify which sex hormones testosterone,...Ch. 18 - Substance X passes through a cell membrane easily....Ch. 18 - In diseases of the gallbladder, which of the...Ch. 18 - Steroids are classified as: a.carbohydrates....Ch. 18 - Accumulation of cholesterol leads to the hardening...Ch. 18 - Cholesterol, in spite of its bad reputation, is an...Ch. 18 - Bile is manufactured in the: a. duodenum. b....Ch. 18 - The basic structure of cell membrane is a: a....Ch. 18 - The mineralocorticoid _____ is a product of the...Ch. 18 - Which cell type has a nucleus? a. bikaryotic b....Ch. 18 - The cells of a human body are: a. bikaryotic...

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
Water intoxication cannot occur because water is so easily excreted by the body. T F

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

A ________ is dissolved in a solvent. a. molecule b. salt c. solute d. chemical bond

Biology: The Unity and Diversity of Life (MindTap Course List)

Why are belts and zones wrapped entirely around the planet?

Foundations of Astronomy (MindTap Course List)

What difficulties complicate scientists attempts to predict earthquakes?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin

Make an order-of-magnitude estimate of your power out-put as you climb stairs. In your solution, state the phys...

Physics for Scientists and Engineers, Technology Update (No access codes included)