Chem 545 exam 1

why don’t we have single chained micelle’s in membrane?

Because single chains make micelle’s

What is a micelle

Single chain lipids that order themselves into a shell when swquestered from water

What makes a vesicle?

A lipid bilayer with an aqueous cavity

Why do micelles form

Increase entropy

Glycerophospholipids

Based on glycerol and makes up lipid bilayer

What is glycerol’s structure?

What double bonds are present in the membrane that are glycerol?

Cis

What is the head group at the end of glycerol?

A phosphate a group with OH usually but can be any of these

Serine is attached where?

At the O chain hydroxyl on a glycerol

What are sterols

They modulate fluidity. Cholesterol.

Peripheral proteins

only stick to surface or head groups. have an affinity for that surface

Peripheral protein covalently linked to lipids are different because

They have a long chain fatty acid that tethers it to the membrane instead of jsut having an affinity

Integral protein

Span the entire membrane inside out

Pores

Hollow space that are either permanently opened or closed and let things through the membrane