Principles of General, Organic, Biological Chemistry
2nd Edition
ISBN: 9780073511191
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Chapter 15, Problem 15.74AP
Some marine plankton contain triacylglycerols formed from the polyunsaturated fatty acid, 3, 6, 9, 12, 15-octadecapentaenoic acid.
CH3CH2CH=CHCH2CH=CHCH2CH=CHCH2CH=CHCH2CH=CHCH2COOH
3, 6, 9, 12, 15-octadecapentaenoic acid
- a. Draw a skeletal structure showing the cis arrangement at each double bond.
- b. Label the hydrophobic and hydrophilic portions of the fatty acid.
- c. How does the melting point of this fatty acid compare to the melting point of oleic acid?
- d. Would you expect this fatty acid to be a solid or a liquid at room temperature?
- e. What type of omega-n acid is this fatty acid?
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Palmitoleic acid, a fatty acid with various pharmaceutical
applications, is mainly obtained from macadamia nuts. The
condensed structural formula for a triacylglycerol containing
three palmitoleic acid units is provided below. Which of the
following statements is NOT true regarding this
triacylglycerol?
O
||
CH,−O−C–(CH,)–CH=CH—(CH2)5–CH3
O
||
CH−O−C−(CH2)–CH=CH–(CH,)5–CH3
O
CH,−O−C−(CH,)–CH=CH–(CH,)5–CH,
O
Its name is glyceryl tripalmitate or tripalmitin.
O It is most likely to be liquid at room temperature.
O It is an oil (not a fat).
O It contains 3 molecules of the same unsaturated fatty acid.
Consider the structure of the amino acid L-alanine.
Which functional groups are common to all amino acids?
H
COOH
NH₂
CH3
Which of the following is not true of a lipid?
They are composed of both hydrophobic and hydrophilic components.
They can contain both sp2 hybridised and sp3 hybridised carbon atoms.
They are always long and linear molecules.
The primary biological functions of lipids include energy storage, signalling and functioning as structural components of cell membranes.
They are important biomolecules for life.
Chapter 15 Solutions
Principles of General, Organic, Biological Chemistry
Ch. 15.1 - In which solvents or solutions will a lipid be...Ch. 15.2 - (a) Draw a skeletal structure for each fatty acid....Ch. 15.2 - Prob. 15.3PCh. 15.2 - Prob. 15.4PCh. 15.3 - Draw the structure of a wax formed from stearic...Ch. 15.3 - One component of jojoba oil is a wax formed from...Ch. 15.3 - What hydrolysis products are formed when cetyl...Ch. 15.4 - Draw the structure of a triacylglycerol that...Ch. 15.4 - Prob. 15.9PCh. 15.4 - Draw the structure of a triacylglycerol that fits...
Ch. 15.5 - Draw the products formed from hydrolysis of each...Ch. 15.5 - Prob. 15.12PCh. 15.6 - Draw the structure of two different cephalins...Ch. 15.6 - Classify each lipid as a triacylglycerol,...Ch. 15.7 - Why are phospholipids rather than triacylglycerols...Ch. 15.7 - Prob. 15.16PCh. 15.8 - Prob. 15.17PCh. 15.8 - Prob. 15.18PCh. 15.9 - Prob. 15.19PCh. 15.9 - Prob. 15.20PCh. 15.10 - Why is it much easier to overdose on a fat-soluble...Ch. 15.10 - Prob. 15.22PCh. 15 - Prob. 15.23UKCCh. 15 - Prob. 15.24UKCCh. 15 - Prob. 15.25UKCCh. 15 - What hydrolysis products are formed when the wax...Ch. 15 - Prob. 15.27UKCCh. 15 - Prob. 15.28UKCCh. 15 - Draw the products formed when the given...Ch. 15 - Prob. 15.30UKCCh. 15 - Prob. 15.31UKCCh. 15 - Prob. 15.32UKCCh. 15 - Prob. 15.33APCh. 15 - Label each compound as a hydrolyzable or...Ch. 15 - Prob. 15.35APCh. 15 - Prob. 15.36APCh. 15 - Prob. 15.37APCh. 15 - How does each of the following affect the melting...Ch. 15 - Rank the fatty acids in order of increasing...Ch. 15 - How would you expect the melting points of the...Ch. 15 - Prob. 15.41APCh. 15 - Why are soaps water soluble, but the fatty acids...Ch. 15 - Draw the structure of a wax formed from palmitic...Ch. 15 - Prob. 15.44APCh. 15 - Prob. 15.45APCh. 15 - Prob. 15.46APCh. 15 - Prob. 15.47APCh. 15 - What hydrolysis products are formed when each wax...Ch. 15 - Draw a triacylglycerol that fits each description:...Ch. 15 - Draw a triacylglycerol that fits each description:...Ch. 15 - Prob. 15.51APCh. 15 - Prob. 15.52APCh. 15 - Prob. 15.53APCh. 15 - Prob. 15.54APCh. 15 - Prob. 15.55APCh. 15 - Draw the products formed when the given...Ch. 15 - Prob. 15.57APCh. 15 - Prob. 15.58APCh. 15 - Prob. 15.59APCh. 15 - Prob. 15.60APCh. 15 - Prob. 15.61APCh. 15 - Why are LDLs soluble in the blood?Ch. 15 - Describe the role of HDLs and LDLs in cholesterol...Ch. 15 - Prob. 15.64APCh. 15 - Prob. 15.65APCh. 15 - Prob. 15.66APCh. 15 - Answer each question with regards to vitamins A...Ch. 15 - Answer each question in Problem 15.67 for vitamins...Ch. 15 - Prob. 15.69APCh. 15 - Prob. 15.70APCh. 15 - Prob. 15.71APCh. 15 - How are soaps and phosphoacylglycerols similar in...Ch. 15 - Some fish oils contain triacylglycerols formed...Ch. 15 - Some marine plankton contain triacylglycerols...Ch. 15 - Prob. 15.75APCh. 15 - Prob. 15.76APCh. 15 - Prob. 15.77APCh. 15 - Prob. 15.78APCh. 15 - Prob. 15.79CPCh. 15 - Prob. 15.80CP
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