Question

16. What is the name of the palmitoleate fatty acid above in omega, o notation? C) -9 A) -7 B) -8 D) -10 Page 3 of 10 First Name Dec 10, 2018 17.Which of the following is NOT a difference between the two fatty acids above, palmitoleate and vaccenate? A) they have a different total number of carbons B) they have a different omega, w notation C) one is cis and the other is trans double bond D) one is protonated and the other is unprotonated at pH 7 18.Which of the following properties would decrease the melting temperature of a fatty acid the most? A) cis double bonds B) longer carbon chains C) trans double bonds D) no double bonds 19. In phospholipids, the fatty acids are linked to the glycerol backbone by the linkages. B) amide C) ketone A) ester D) glycosidic 20. What aspect of fatty acids prevent them from forming a bilayer on their own? C) they are charged D) lack hydrophobic region A) wrong shape B) no polar head 21. Butter is a solid at room temperature, so what type of fatty acid chains would you expect butter to contain? B) monounsaturated C) poly-cis-unsaturated D) poly-trans-unsaturated A) saturated 22. What type of energy does a membrane channel use? B) charge gradient C) pH gradient A) ATP D) none

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Answer 1

16) Answer is a). It is omega-7 because position of double bonded carbon is 7th from CH3.

17) Answer is b). Because both are omega-7.

18) Answer is a). All other increase the melting point.

19) Answer is a). They contain ester COO linkage.