Which of the following statements are true about fatty acids? Fatty acids are referred to as "saturated" if they have one or more C-C double bonds. Fatty acids are highly reduced and thus are an excellent energy source: they provide more ATP per carbon upon oxidation than any other biomolecule. By definition, fatty acids can never exceed 20 carbons in length. Fatty acids may contain double bonds, which are usually in the trans configuration. Fatty acids are not stored in their free forms.

Which of the following statements are true about fatty acids? Fatty acids are referred to as "saturated" if they have one or more C-C double bonds. Fatty acids are highly reduced and thus are an excellent energy source: they provide more ATP per carbon upon oxidation than any other biomolecule. By definition, fatty acids can never exceed 20 carbons in length. Fatty acids may contain double bonds, which are usually in the trans configuration. Fatty acids are not stored in their free forms.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter2: Molecules Of Life

Section: Chapter Questions

Problem 4FIO: Figure 2.17 Fatty acids. Double bonds in the tails are highlighted in red. A. The tail of stearic...

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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
Figure 2.17 Fatty acids. Double bonds in the tails are highlighted in red. A. The tail of stearic acid is fully saturated with hydrogen atoms. B. Linoleic acid, with two double bonds, is unsaturated. The first double bond occurs at the sixth carbon from the end of the tail, so linoleic acid is called an omega-6 fatty acid. Omega-6 and C. omega-3 fatty acids are essential fatty acids, which means your body does not make them and they must come from food. D. The hydrogen atoms around the double bond in oleic acid are on the same side of the tail. Most other naturally occurring unsaturated fatty acids have these cis bonds. E. Hydrogenation creates abundant trans bonds, with hydrogen atoms on opposite sides of the tail. Figure It Out: Are the double bonds in linolenic acid cis or trans?
Fatty acids are esterified into mono-, di-, or triglycerides by attaching to: Sterol Cholesterol Glycerol Sodium chloride Omega-3 fatty acids have which of the following? At least 3 double bonds A 3-carbon backbone A double bond 3 carbons from the end of the chain At least 3 fatty acid molecules linked by omega bonds
Trans-fatty acids are synthetic forms of fatty acids made from altered unsaturated fatty acids. Trans-fatty acids are denser, solid at room temperature, and store more energy in the same unit of volume than unsaturated fatty acids. The production of trans-fatty acids involves the reorientation of one of the hydrogen atoms attached to a double-bonded car- bon atom, as illustrated in the figure below. unsaturated fatty acid OHHHHH HOC CCCC-c II I I HHHH trans-fatty acid |||| Molecular model of an unsaturated and trans-fatty acid Based on the structures shown above, H -C-C-C-C-C-H HHHHH TTTTT !!!!! HHHHH OHHHHH | ! ! ! ! ! HO-C-C-C-C-c-c IIII HHHH H HHHHH H HH III C-C-C-H I (a) Identify one property of all fatty acids. (b) Describe one of the functions of fatty acids in living systems. (c) Explain how the reorientation of the hydrogen atom as shown in the image allows the trans- fatty acids to be denser and solid at room temperature. Respond to each part in 3 to 5 complete sentences.
Unsaturated fatty acids are commonly esterified at the hydroxyl substituent of glycerol at what carbon number? 1st carbon 2nd carbon 3rd carbon All carbons
Which of the following represents a proper designation for monounsaturated fatty acid ? 18:0 18:1 (A6) O 17:3(A6,9,12) 17:2 (A5,8)
Which is NOT true about fatty acids? Select the correct answer below: In a triglyceride, the fatty acids are attached to each of the three carbons of the glycerol molecule with an ester bond through an oxygen atom Fatty acids have a long chain of hydrocarbons to which a ketone group is attached Fatty acids most commonly contain 12–18 carbons The number of carbons in a fatty acid may range from 4 to 36. Please explain each
Which of the following is NOT TRUE about unsaturated fatty acids?
Which of the following might be a feature(s) of a lipid that has been converted from a fully saturated fatty acid to a fatty acid containing several trans double bonds? Select all that apply. The trans fatty acid will now have a higher melting temperature compared to the fully saturated precursor The trans fatty acid will be able to pack more closely with saturated fatty acids, than with unsaturated fatty acids containing cis double bonds The trans fatty acid will now have a lower melting temperature compared to the fully saturated precursor The trans fatty acid will be able to pack most closely with unsaturated fatty acids containing cis double bonds, than with saturated fatty acids
Which of the following is true of sphingolipids? They always contain glycerol and fatty acids. They may be charged, but are never amphipathic. They contain two esterified fatty acids. Phosphatidylcholine is a typical sphingolipid. The sphingosine backbone is O-linked to a head group.
Match each of the following aspects of triacylglycerols (TAGs) with the main structural feature which makes it possible. You may use each match only once. Ester linkages are vulnerable to hydrolysis. TAGS are not amphipathic. TAGS are hydrophobic and are stored anhydrously. Most of the carbons in TAG are highly reduced. 1. 2. 3. 4. TAGS can produce more energy per carbon than glycogen. TAGS can be stored safely, without danger of dissolving cell membranes. TAGS are a much lighter energy store than an equivalent amount of glycogen. The free fatty acids can be readily liberated from the TAGS when they are required for energy production.
All of the following pairs are well-match, except one: O Oleic fatty acid is : unsaturated fatty acids O Saturated fatty acids : solid at room tempreture Ceramide : simplest glycerolipid O TGs: stored in adipose tissue