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membranes_89

QuestionAnswer
What is the main composition of membranes? (4 things) Phospholipids, cholesterol, glycolipids, and proteins
What composes of the polar hydrophilic head of a phospholipid? Choline, Phosphate, and glycerol
What composes of the nonpolar region of a phospholipid? 2 hydrocarbon tails, one with a double bond
Draw the structure of the hydrophilic head OKAY
What are the three types of phospholipids with glycerol? Phosphatidyl-ethanolamine Phosphatidyl-serine Phosphatidyl-choline
What are the features of sphingomyelin? It has a fatty chain and a fatty tail It dies not have glycerol, but sphingosine End group is choline
What are the features of sphingosine? Only one fatty chain no glycerol, but sphingosine No phosphate or added amino group
In what types of membranes is cholesterol abundant? Eukaryotic membranes
What is a purpose of cholesterol? increases fluidity
Briefly describe cholesterol structure rigid ring structure with a small polar head group and long nonpolar hydrocarbon tail
Where do glycolipids exist? In the outer leaflet of the cell membrane
Where are glycolipids created? Golgi
Name 3 types of glycolipids galactocerebroside GM1 ganglioside sialic acid
Where do disulfide bonds exist? oxidizing environment - non cytosol
Where do sulfhydryl groups exist? Reducing environment in cytosol
Where do carbohydrate groups exist? on the outer/laminar side of the protein
Created by: neeck
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