Lipid bilayers comprising high concentrations of gangliosides are very rare. Which of the following explanation is/are true? . Please note, there could be more than one answer. Gangliosides are not used as energy storage molecules. The hydrophobic tails on gangliosides form a conical shape rather than a cylindrical shape making close packing difficult. Gangliosides contain large headgroups making close packing difficult Gangliosides contain trans fatty acids resulting in a bent hydrophobic tail making close packing difficult Gangliosides contain several sugar molecules that can only localize to the cytosol preventing bilayer formation

Feature Ceulose Collagen Fibrous Monomers joined by condensation reactions Monomers identical Branching a Describe the different berween hydrophobic and hyirophilic using phospholipid moleces as an example

H "H H H HO Choose all of the following are true of the given structure? (Choose all of the correct answers)

The figure below illustrates the molecular structures of two fatty acids. 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? O 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.

Of the following cell membrane lipids, which one prefers to reside in the inner leaflet (or inner half) of the membrane bilayer, AND has an overall neutral charge at physiological pH (7.4)? a) PE (phosphatidylethanolamine) is inner-leaflet with an overall neutral charge at pH 7.4 b) SM (sphinogomyelin) is inner-leaflet with an overall neutral charge at pH 7.4 c) PS (phosephatidylserine) is inner-leaflet with an overall neutral charge at pH 7.4 d) PC (phosphatidylcholine) is inner-leaflet with an overall neutral charge at pH 7.4