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Set 2 4 Biological Membranes

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Question 1

(Multiple Choice)

Free
Fatty acids consist of

A) A hydrocarbon chain and an alcohol group on one end
B) A hydrocarbon chain and an ester bond at the far end
C) A hydrocarbon chain and an ether bond at the far end
D) A hydrocarbon chain and an carboxylic acid group at the far end
E) A hydrocarbon chain and an SH group at the far end

Answer

Question 2

(Multiple Choice)

Free
Motion of lipids in a biological membrane is

A) Slow in all directions
B) Slow across the membrane, but fast in the plane of the membrane
C) Rapid in all directions
D) Fast across the mem brane, but slow in the plane of the mem brane
E) Re stricted except in lipid rafts

Answer

Question 3

(Multiple Choice)

Free
Cardiolipin consists of

A) Sphingomyelin with attached carbohydrate molecules
B) Two sphingosine molecules linked by a glycerol
C) Two phosphatidyl choline molecules linked by a phosphate
D) Two phosphatidic acid molecules linked by a glycerol
E) Two ceramide molecules linked by a phosphate

Answer