2.8 MEMBRANE LIPIDS: SPHINGOGLYCOLIPIDS

Question 1

● a lipid that contains both a fatty acid and a carbohydrate component attached to a sphingosine molecule
undergo hydrolysis and saponification reactions

Answer 1

(sphingoglycolipid)

Question 2

● A fatty acid is attached to the sphingosine through

Answer 2

(an amide linkage)

Question 3

A monosaccharide or oligosaccharide is attached to the sphingosine at the terminal –OH carbon atom through a

Answer 3

● Glycosidic linkage)

Question 4

● Tails of sphingoglycolipids

Answer 4

(the fatty acid and the long carbon chain of sphingosine

Question 5

● Head of sphingoglycolipid

Answer 5

(mono- or oligosaccharide)

Question 6

● The simplest sphingoglycolipids, which are called________, contain a single monosaccharide unit—either glucose or galactose. As the name suggests, cerebrosides occur primarily in the brain (7% of dry mass). They are also present in the myelin sheath of nerves.

Answer 6

cerebrosides)

Question 7

● what are the 3 membrane lipids

Answer 7

● Glycerophospholipid Sphingophospholipid Sphingoglycolipid)

Question 8

● 2 glycerolipids

Answer 8

Triacylglycerol Glycerophospholipid

Question 9

● 2 sphingolipids

Answer 9

Sphingophospholipid Sphingoglycolipid

Question 10

● More complex sphingoglycolipids, called_________, contain a branched chain of up to seven monosaccharide residues. These substances occur in the gray matter of the brain as well as in the myelin sheath.

Answer 10

(gangliosides

Question 11

1. The number of structural building blocks present in a sphingoglycolipid in which a single mono unit is present is?

Answer 11

• 3

Question 12

2. Which of the following types of linkages are always present in a sphingoglycolipid?

Answer 12

• amide and glycosidic