Concept explainers
(a) Draw a skeletal structure for each fatty acid. (b) Label the hydrophobic and hydrophilic portions of each molecule. (c) Without referring to Table 15.2, which fatty acid has the higher melting point, A or B? Explain your choice.
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Principles of General, Organic, Biological Chemistry
- 4. The ester you drew in Question #1 has a melting point range of 32-35 °C. The methyl ester of mono-unsaturated palmitoleic acid (IUPAC name: hexadec-9enoic acid) has a considerably lower melting point range: -0.5-+0.5 °C. a) Explain what it means for a fatty acid to the "mono-unsaturated." b) Illustrate your explanation by drawing the structure of the methyl ester of octadec-11-enoic acid. (Be sure to draw the geometric stereoisomer that is commonly found in nature.)arrow_forward1a) Draw the structure of an Omega-5 fatty acid with an 14:2 designation. b) Provide a reaction for the partial hydrogenation of the fatty acid in Question 1(a). Is the product that forms still an Omega-5 fatty acid? Explain your answer.arrow_forward(a) Give the omega designation for the following fatty acid: Но (b) Give the omega designation for the following fatty acid: HOarrow_forward
- A lipid has the following structure: CH2-O-CH2-(CH2)16CH3 0 CH-O-C-(CH2)4CH=CHCH2CH=CH(CH2)7CH3 0 || CH2-O-C-(CH2)4CH-CHCH2CH=CH(CH2)7CH3 Which of the statements are true or false about the structure above Both this structure and a wax contain one or more carboxyl groups This lipid and a prostaglandin can both be hydrolyzed in acid to create fatty acids This lipid and a thromboxane can both be hydrolyzed in base to produce soaps Both this lipid and a terpene can be very hydrophobic molecules Based on its structural similarity to other lipids, this lipid most likely functions as a membrane component Both this structure and a wax contain one or more ester bonds This lipid and an arachidonic acid both contain glycerol and hydrocarbon chains Based on its structural similarity to other lipids, this lipid most likely functions as an energy storage molecule Both this lipid and a terpene can contain isoprene This lipid and a leukotriene are both polyunsaturated molecules Both this structure…arrow_forwardCertain omega-3 fatty acids can be found only in animal sources, such as fatty fish. Two of these are eicosapentaenoic acid (EPA) [20:5] and docosahexaenoic acid (DHA) [22:6], both of which are ω-3 fatty acids. DHA has been shown to be important in healthy brain development, so it has recently been added to infant formulas. Breast milk is rich in DHA as long as the mother maintains a healthy diet that includes fish. Draw skeletal structures of the fatty acids EPA and DHA.arrow_forwardDraw a trans-unsaturated fatty acid with the formula CH3CH=CH(CH2)6COOH.arrow_forward
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- Draw the skeletal ("line") structure of a saturated fatty acid with 8 carbons. Continue 143 Click and drag to start drawing a structure. D с с X S e ->>arrow_forwardhow do you draw the skeletal line structure of a 8:0 fatty acid?arrow_forwarde X 1. During the hydrogenation of a cis-linked unsaturated fat, it will always convert to a trans fat when using a catalyst such as Nickel. True or False 2. Triglycerides always have three fatty acid chains linked to a glycerol group, and these fatty acids always have to have the same number of carbons in theirarrow_forward
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