9. Lipides Flashcards

1
Q

Quelle particularité ont la plupart des acides gras ?

A

Nombre de carbone impair.

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2
Q

Dans quelles configuration trouve ton surtout les doubles liaisons ?

A

Cis.

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3
Q

Que sont les triacylglicerols ?

A

Molécule de stockage de graisse.

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4
Q

Glycerophospholipide ?

A

Le lipide structurel le plus abondant.

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5
Q

à pH 7 qu’arrive il a la tête polaire des glycerophospholipides ?

A

Elle est ionisée.

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6
Q

Galactolipids ?

A

Trouvés dans les membranes de chloroplastes. Diacylglycerol + galactose residus.

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7
Q

Sphigolipids ? Exemples.

A

Continuent sphigosine, pas de glycerol. Sphingomyeline, Cerebrosides, Globosides, gangliosides.

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8
Q

Sterols ?

A

Squelette steroide; Cholesterol est le plus abondant.

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9
Q

Quel est le rôle particulier des lipides ?

A

Signalisation, cofacteurs.

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10
Q

Donner des lipides de signalisation intracellulaire.

A

phosphatidylinositols, sphigosine.

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11
Q

Donner des lipides d’hormones paracrines.

A

eicosanoids.

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12
Q

Donner des lipides de messagin entre tissus

A

steroids hormones

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13
Q

Donner des lipides de redox.

A

quinones ( vitamines E et K)

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14
Q

Donner des lipides de transport du sucre.

A

Dolichols.

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15
Q

Comment peut on analyser des lipides ?

A

High Perf Liquid Chromato. Structure déterminée avec une MS.

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