Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.14PS
QUANTITATIVE Thinking About Lipids. You should be able to answer each of the following questions based on the properties of lipids discussed in this chapter:
- (a) How would you define a lipid? In what sense is the operational definition different from that of proteins,
nucleic acids , or carbohydrates? - (b) Arrange the following lipids in order of decreasing polarity: cholesterol, estradiol, fatty acid, phosphatidyl choline, and triglyceride. Explain your reasoning.
- (c) Which would you expect to resemble a sphingomyelin molecule more closely: a molecule of phosphatidylcholine containing two molecules of palmitic acid as its fatty acid side chains or a phosphatidylcholine molecule with one molecule of palmitate and one molecule of oleate as its fatty acid side chains? Explain your reasoning.
- (d) Assume you and your lab partner Chris determined the melting temperature for each of the following fatty acids: arachidic, linoleic, linolenic, oleaic, palmitic, and stearic acids. Chris recorded the melting points of each but neglected to note the specific fatty acid to which each value belongs. Assign each of the following melting temperatures (in °C) to the appropriate fatty acid, and explain your reasoning: −11, 5, 16, 63, 70, and 76.5.
- (e) For each of the following amphipathic molecules, indicate which part of the molecule is hydrophilic: phosphatidylserine, sphingomyelin, cholesterol, and triacylglycerol.
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Check out a sample textbook solutionStudents have asked these similar questions
Long explanations are not needed. Direct answers would suffice.
a. Which of the following is NOT an example of structural polysaccharides?
I. amylose
II. cellulose
III. chitin
b. Which of the following is the epimer of glucose at C-2?
I. gulose
II. galactose
III. mannose
IV. fructose
V. talose
Long explanations are not needed. Direct answers would suffice.
a. Carbohydrates can function in livings systems as any of the following, EXCEPT:
i. storage of energy
ii. structural and mechanical support
iii. aid in cell surface recognition
iv. storage of genetic information
v. source of ATP when catabolized
b. Which of the following structural representations best describes an open-chain monosaccharide, either an aldose or a ketose?
i. Fischer projection
ii chair conformation
iii boat conformation
iv. Haworth projection
Polysaccharide -
Glycogen –
Starch –
Section 2.7
Lipids – insoluble in
Trigyclerides – made of one molecule of
and three molecules of
(Figure 2.16)
Saturated vs. unsaturated fats:
Phospholipids – primary component of
Figure 2.17
Steroids
Examples of steroids:
Section 2.8
Proteins – complex structures made of
Figure 2.19
How many different amino acids are there?
What is the difference between a polypeptide and a protein?
Figure 2.20
Protein function depends on
What are the four levels of protein structure? Figure 2.21
Primary –
Secondary –
pg. 6
Chapter 3 Solutions
Becker's World of the Cell (9th Edition)
Ch. 3 - What structural features of protein molecules...Ch. 3 - Prob. 3.1CCCh. 3 - Like proteins, nucleotides are important...Ch. 3 - Polysaccharides are also important macromolecules...Ch. 3 - Prob. 3.4CCCh. 3 - Polymers and Their Properties. For each of the six...Ch. 3 - Stability of Protein Structure. Several different...Ch. 3 - Prob. 3.3PSCh. 3 - Prob. 3.4PSCh. 3 - Hair Versus Silk. The a-keratin of human hair is a...
Ch. 3 - The Permanent Wave That Isnt. The permanent wave...Ch. 3 - Features of Nucleic Acids. For each of the...Ch. 3 - Wrong Again. For each of the following false...Ch. 3 - Prob. 3.9PSCh. 3 - Prob. 3.10PSCh. 3 - Telling Them Apart. For each of the following...Ch. 3 - Prob. 3.12PSCh. 3 - Prob. 3.13PSCh. 3 - QUANTITATIVE Thinking About Lipids. You should be...Ch. 3 - Shortening. A popular brand of shortening has a...
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- Examine the membrane lipid pictured below and answer the following questions: a. Is this lipid classified as a phospholipid or a glycolipid? Explain your answer in two sentences.b. Is this lipid considered a sphingolipid or a glycerophospholipid? Justify your answer in two sentences. c. What fatty acid chains are used in this lipid? Are they saturated or unsaturated? What functional group enables them to connect to the backbone?arrow_forwardmolecule. Which of the following fatty acids is an omega-3 fatty acid? bond starting with the third carbon from the methyl end (the omega end) of the Omega-3 (@-3) fatty acids are unsaturated fatty acids with a carbon-to-carbon double a-linolenic a) b) stearic oleic linoleic myristic ebil The molecule at the left is an example of which lipid? CH2 a) b) wax terpene steroid CH2 -0-P-0- d) sphingolipid glycerophospholipid bigit nisrtarrow_forwardTrue or False. Lipids are connected by phosphodiester bonds ?arrow_forward
- Please explain. Be concise. Make sure your drawings are legible. Draw a chart for the classifications and subclassifications of lipidsarrow_forwardLipids Concept Map Add these terms to your concept map should include these concepts and details: Structure (functional groups, shape); Monomer; Linkage; Properties; Functions; Key terms from the Partial List of Key Terms from the Minds Partial Key Term List fatty acid glycerol triglyceride wax steroid amphipathic ester linkage phospholipid micelle bilayer mosaic independent variable dependent variable controlled variables glycolipid glycolprotein transmembrane proteinarrow_forwardTrue or False. Write true if the statement is correct and false if the statement isnot true.___________ 1. Compounds with same molecular formulas are called isomers.___________ 2. Hydrolysis reaction occurs when the bond between monosaccharides is broken with theaddition of a sugar molecule.__________ 3. Sucrose is form when glucose and fructose combine, while lactose formed when galactose andfructose combine.arrow_forward
- Long explanations are not needed. Direct answers would suffice. a. Which of the following is not a complex conjugated carbohydrate? I. lipopolysaccharide II. proteoglycan III. glycoprotein IV. peptidoglycan V. oligosaccharide b. Gluconic acid is derived from _______ while glucuronic acid is derived from ______. I. glucose: gulose II. galactose: glucose III. gulose: glucose IV. glucose: glucose V. glucose: galactosearrow_forwardDiscuss the biochemically important monosaccharide and explain its significance in human body. Compare and contrast glycolipids and glycoproteins.arrow_forwardfunctional group polarity intermolecular forces of attraction hydrogen bon What similarity did you notice among the names of all the carbohydrates? Explain which of the 4 nutrients you think is most important to the proper functioning of your bodyarrow_forward
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