7. (11.38) a. To which class of phospholipids does the compound belong? CH3(CH2)CH2CH=CH-CH-OH CH3(CH2)4(CH=CHCH2)2 (CH2)6 C-NH-CH CH 3 | + CH₂O-P OCH2 CH2N-CH3 CH3 b. How do other members of this class of phospholipids differ from one another? c. Draw the products obtained when the molecule is saponified into its component parts. d. For each product from part c, state whether it is hydrophobic, hydrophilic, or amphipathic.

13.  Which of the following statements about membrane phospholipids is/are true?   a)  They are oriented within biological membranes with polar head groups facing the outsides of the membrane.   b)  Only if assisted by the appropriate enzymes, phospholipids in aqueous solution will form themselves into bilayers, which seal their edges by forming droplets.   c)  They can have different shapes depending on the presence of double bonds in their fatty acid tails.   d)  a and c   e)  a, b and c

What characteristics of phopholipids make the lipid bilayer fluid?

Sphingolipids are considered as phospholipids if: O The polar head group contains a single sugar (carbohydrate) such as glucose All sphingolipids are phospholipids O The polar head group contains a phosphate group The polar head group contains a complex sugar (carbohydrate) containg sialic acid

Two different membrane components are shown in the figure below. HO B A CH3 choline head group C glycerol backbone H3C D hydrocarbon tail CH3 CH3 CH3 B- C- D CH₂ 0 CH3 O CH3 C=O C=O CH-CH₂ What are the molecular modules indicated by the letters A-D? Select from the two options provided for each module. Asterol polar head group CH₂ CH₂ O CH3

17.

a) List the constituents of phospholipids. b) Phospholipid molecules were suspended in a mixture made up of water/oil. Describe the molecular arrangement that will occur and provide explanation for the arrangement of the molecules in the aqueous/oil mixture environment and its application in cell membrane functions

What is the structure of a phospholipid present in the phospholipid bilayer?

15

what is/are the product of hydrogenation?