A B H₂C The structural formula of erucic acid and behenic acid с H₂C D erucic acid behenic acid Which of the following best explains why erucic acid is liquid at room temperature but behenic acid is solid at room temperature? OH The presence of a double carbon to carbon bond in erucic acid prevents the molecule from packing closely together. The lack of any double carbon-carbon bonds in behenic acid causes the molecule to be come polar and therefore packed more tightly. The larger number of carbon atoms in erucic acid prevents the molecule from packing tightly together. OH The smaller number of carbon atoms in behenic acid creates stronger covalent bonds between the carbon atoms allowing for them to pack more tightly together.

A B H₂C The structural formula of erucic acid and behenic acid с H₂C D erucic acid behenic acid Which of the following best explains why erucic acid is liquid at room temperature but behenic acid is solid at room temperature? OH The presence of a double carbon to carbon bond in erucic acid prevents the molecule from packing closely together. The lack of any double carbon-carbon bonds in behenic acid causes the molecule to be come polar and therefore packed more tightly. The larger number of carbon atoms in erucic acid prevents the molecule from packing tightly together. OH The smaller number of carbon atoms in behenic acid creates stronger covalent bonds between the carbon atoms allowing for them to pack more tightly together.

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter3: The Chemistry Of Life: Organic Compounds

Section: Chapter Questions

Problem 7TYU: Saturated fatty acids are so named because they are saturated with (a) hydrogen (b) water (c)...

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Saturated fatty acids are so named because they are saturated with (a) hydrogen (b) water (c) hydroxyl groups (d) glycerol (e) double bonds
Olestra has been used in certain snack foods as an alternativeto fats and oils. Its structure consists of a sucrose molecule inwhich all free hydroxyl groups have formed esters with oleicacid (an 18-carbon monounsaturated fatty acid). Olestra molecules contain no calories because they are exceptionallylarge and cannot be digested. Draw the structure of olestra.Use R—COOH as an abbreviation for oleic acid.
When a substance such as sodium chloride is dissolved inwater, the ions that form become completely surrounded bywater molecules, which form structures called hydrationspheres. When the sodium salt of a fatty acid is mixed withwater, the carboxylate group of the molecule becomeshydrated but the hydrophobic hydrocarbon portion of themolecule is poorly hydrated, if at all. Using a circle torepresent the carboxylate group and an attached squigglyline to represent the hydrocarbon chain of a fatty acid, drawa picture of how fatty acids interact in water.
Glycerolphospholipid head groups include coline, ethanolamine, glycerol and serine. Which of these groups can use hydrogen bonding or rather participate in in. And why?
When a substance such as sodium chloride is dissolved in water, the ions become completely surrounded by water molecules, forming structures called hydration spheres. When the sodium salt of a fatty acid is mixed with water, the carboxylate group of the molecule becomes hydrated, but the hydrophobic portion of the molecule is poorly hydrated, if at all. Using a circle to represent the carboxylate group and an attached squiggly line to represent the hydrocarbon chain of a fatty acid, draw a picture of how fatty acids interact with water.
Figure 1 shows the melting temperature vs chain length of stearic acid, i.e. octadecanoic acid. 90 80 - Stearic acid 70 60 40 30 Room temperature 20 10 -10 -20 4 6 8 10 12 14 16 18 20 22 24 Number of carbon atoms Figure 1 (i) What is the appearance of stearic acid at room temperature? (ii) Where would the melting temperatures of the following fatty acids, oleic acid (cis-9- Octadecenoic), linoleic acid (cis,cis-9,12-Octadecadienoic), and linolenic acid (All cis- 9,12,15-Octadecatrienoic), fall on the Figure 1? Plot and indicate their relative locations. Briefly explain why. Temperature ("C)
Which of the following is true about the waxes? incorporate terpenes as part of their structures formed by an amide bond between a fatty acid and sphingosine structures include two fatty acids linked to glycerol made of a ceramide with additional chemical groups attached formed by an ester bond between a fatty acid and a long-chain alcohol a)
Sphingolipids can contain of all of the following except O Glycerol O more than one choice O phosphate O a mono- or oligosaccharide O sphingosine.
Complete hydrolysis of a glycerophospholipid yields glycerol, two fatty acids (16:1(Δ9) and 16:0), phosphoric acid, and serine in the molar ratio 1:1:1:1:1. Name this lipid and draw its structure.
Determine the class of lipid (see attached image for choices) shown by the following structures and whether if it is saponifiable or non-saponifiable.s
released into water so thy greinsulated from Oter *The melting points of a series of 18-carbon fatty acids are: stearic acid, 69.6°C; oleic acid, 13.4°C; linoleic acid, -5°C; and linolenic acid, -11°℃. c) a) b) What structural aspect of these 18-carbon fatty acids can be correlated with the melting point? Draw all the possible triacylglycerols that can be constructed from glycerol, palmitic acid, and oleic acid. Rank them in order of increasing melting point. Branched-chain fatty acids are found in some bacterial membrane lipids. Would their presence increase or decrease the fluidity of the membranes (that is, give them a lower o higher melting point)? Why?
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