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14 Cards in this Set

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  • Back
What are the major constituents of membranes
lipids
What are the 5 types of lipids
Neutral lipids
Phospholipids
Glycolipids
Lipoproteins
Isoprenoids
Fatty acids usually have even numbered or odd numbered carbon atoms
Even
What type of fatty acids have 1 to 4 double bonds
unsaturated
What class of animal requires fatty acids with two or more double bonds
mammals
Usaturation affects the melting point how
decreases the melting point
Cis double bonds to what to the linear chain
cause kinks
What in membranes act as pumps or channels
proteins
What is the function of biological membranes in reference to organelles
keeps organelle constituents separate from the cytoplasm
What part of phospholipids exposed to water and what part is shielded from the medium
Polar head groups are exposed to the water
hydrocarbon tails shielded from the medium
What are the major constituents of the bilayer
phospholipids
What is lateral diffusion? What is transverse diffusion? Which is faster?
lateral stays on the same side of the membrane and moves across

transverse switches sides of the bilayer.

lateral is faster
Proteins in membranes function how in relation to small molecules such as water and ions
provide hydrophilic passages
What is passive transport? What is active transport?
passive requires no energy input
active requires ATP, proton or sodium gradients to produce energy for transport