lipids Flashcards
lipid functions
membrane structure, signaling. protein membrane anchors, protection against oxidation, energy storage, waterproofing and protection
lipids that contain fatty acids can be further seperated into
storage lipuds and membrane lipids
storage lipids are stored as
triglycerides
membrane lipids are
phospholipids, glycolipids and archaebacterial ether lipid
fatty acids are carboxylic acids with long chain ____ side groups
hydrocarbon
no c-c double bond
saturated
one c-c double bond
monounsaturated
more than one c-c double bond
polyunsaturated
most natural fatty acids are cis double bonds and are ____
unbranched
delta x is the ___ of the double bonds counting from the carboxyl terminal
delta
with ___ fatty acids you don’t start from carboxyl terminal
omega
triacylglycerols are fatty acid triesters of ____
glycerol
structural lipids have ___ head and ___ tails
polar and nonpolar
organisms differ in membrane lipid __ group composition
head
what is the head group substituent of phosphatidic acid (glycerophospholipid)
None
what is the head group substituent of phosphatidylethanolamine (glycerophospholipid)
ethanolamine
what is the head group substituent of phosphatidylcholine (glycerophospholipid)
choline
what is the head group substituent of phosphatidylserine (glycerophospholipid)
serine
phosphlipases hydrolyze phospholipids at
specific sites
_____ is found in the myelin sheath around nerve cells
sphingomyelin
ABO blood groups are determined in part by the ____ found in the head groups of glycosphingolipids
sugars
steroid hormones are derived from ___ (always have ring structure)
cholesterol
unsaturated fatty acids can pack ____ because the double kinks the structure (less stable)
tightly
