What are lipids mosty composed of?
C's and H's some O's
Are lipids usually polar or non polar?
Are lipids usually hydrophobic or hydrophilic?
hydrophobic, they can by amphipathic= hydrophilic at one end and hydrophobic at the other
What is a fatty acid made up of?
a carboxyl group and a a hydrocarbon tail
What are the charcteristics of a saturated FA?
no double bond between C atoms, the shape is straight, for animals it is solid at room temp
what are the characteristics of an unsaturated FA
it is missing some H's, it has at least one double bond between C, the shape is kinked, for plants it is liquid at room temp.
What are the three main classes of lipids
Triglycerides(fat), Phospholipids, and sterols/steroids
What are the characteristics of a triglyceride?
3 FA's attached to 1 glycerol, used for NRG storage
What are the characteristics of a phospholipid?
two FA + 1 glycerol + 1phosphate group, make up the lipid bilayer of the cell
what are the characteristics of a sterol/steroid?
4 carbon rings
What is the fxn of actin?
cantractile protein often interact w/ other protns to make cells contract
What is the function of Maltase?
it is an enzyme and it breaks down maltose
what is the fxn of hemoglobin?
transport prtn, most of the O2 is carried by hemoglobin
many steriod hormones in animals are produced from what?