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Biochemistry

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Lipid

Question
9 out of 63
 

Alcoholic group is found in



A Galactoside
B Cerebroside

C Sphingomyelin
D Lecithin

Ans. D Lecithin

a. Lecithin is a phospholipids consists of —

= glycerol an Alcohol + fatty acid + phosphoric acid + choline

b. sphingomyelin is a phospholipids contains - = fatty acids + phosphoric acid + choline + sphingosineshingosine is a complex Amino alcohol

c. Glycolipids =

Glycosphingosides: simplest form is cerebroside: eg. galactosylceramidecontain = galactose + fatty acid + sphingosine.

No phosphoric acid, no glycerol alcohol.

Glycosphinogosides are-

- Found. in brain, characteristically C24 fatty acids occurs in many glycosphingolipid, particularly those in brain eg. Lignoceric, cerebronic, and Nervonic acids. * Deficiency of β-glucosidase or β-gluco-cerebrosidosescauses Gaucher’s disease accumulation of glucosylceramide.

2. Gangliosides

Ganglioside contain —

Ceramidesphingosine + fatty acid + glucose and / or galactose + N. Acetyl galactosamine and sialic acid N-acetyl neuraminic acid

a. Tay-sack’s disease GM1gangliosidosisdue to deficiency of Hexosaminidase A

b. Sandhoff’s disease to deficiency of Hexosaminidase A and B.

Now, clear from above, that lecithin contain glycerol a simple alcohol and rest contain sphingosine which is a complex amino alcohol

Lipid Flashcard List

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