Exam 1 - Lipids and membranes (7)

what is difference between saturated and unsaturated fatty acid

saturated have only single bonds

What forms unsaturated fatty acids?

kinks from double bonds

what is cis and trans orientation

cis orientation means carbons are all on the same plane, trans is when carbons are on opposite planes

are saturated lipids solid at room temp

solid at room temp

what are phospholipids

polar head, nonpolar tail

how is permeability of lipids

selectively permeable

what is permeable in lipid membrane (2)

small nonpolar or uncharged polar molecules

how can lipids be more fluid

less tightly packed

long unsaturated hydrocarbon tail vs long saturated hydrocarbon tails and permeability

long saturated hydrocarbons have less permeability bc more packing

how does temperature affect fluidity

higher temperature increase fluidity

what is a steroid

lipids characterized by a carbon skeleton consisting of four fused rings

how does cholesterol affect cooler temperatures

maintains fluidity by preventing tight packing of phospholipids

how does cholestrol affect warer temperatures

cholestrol decreases fluitity by pulling lipids together

are lipids soluble

no