Sphingosine is not a component of:

A) Sphingomyelin.                                               

B) Ceramide.                                 

C) Cerebrosides.

D) Gangliosides.

E) Phosphatidylcholine.

Tay-Sachs disease is caused by an inability to degrade:

A.) Sphingosine.                                                        

B) Gangliosides. 

C) Ceramide. 

D) Dipalmitoyl phosphatidyl choline.

E) Carbohydrates.

Which of the following is true regarding a ganglioside?

A) It has 3 hydrocarbon tails.

B) It is the most abundant membrane lipid molecule.

C) It is a sterol lipid.

D) It contains oligosaccharides with one or more sialic acid residues. 

E) It is found in myelin sheath cells.