ACIDES GRAS Flashcards

1
Q

Molécule dérivé de

A

d’hydrocarbure

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2
Q

Niveau oxydation

A

très faible

Composé réduit en comparaison avec les protéines ou les glucides

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3
Q

Partie polaire

A

Groupement carboxylique

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4
Q

partie non polaire

A

chaine carbonée

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5
Q

Conformation majoritaire des acides gras insaturé

A

Cis

angle de 120°

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6
Q

Solubilité eau diminue quand nb de carbone

A

augmente

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7
Q

Solubilité eau diminue quand nb doubles liaison

A

augmente

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8
Q

Solubilité dans eau

A

très faible à ph physiologique grâce groupement COO-

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9
Q

Solubilité acide laurique

A

0,063 mg/g d’eau

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10
Q

Solubilité glucose

A

1 100mg/g d’eau

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11
Q

Point de fusion diminue quand nb de carbone

A

diminue

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12
Q

Point de fusion diminue quand nb double liaison

A

augmente

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13
Q

Acide laurique

A

C12: 0

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14
Q

Acide palmique

A

C16: 0

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15
Q

Acide stéarique

A

C18: 0

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16
Q

Acide oléique

A

C18: 1 ▵9

Famille w9

17
Q

Acide linolénique

A

C18: 2 ▵9,12

Famille w6

18
Q

Acide linolénique

A

C18: 3 ▵9,12,15

Famille w3

19
Q

Acide arachidonique

A

C20: 4 ▵5,8,11,14

Famille w6

20
Q

Synthèse acide oléique à partir

A

acide stéarique

21
Q

Synthèse acide arachidonique à partir

A

acide linoléique

22
Q

Acide gras essentiel

A
  • AG w6 sauf acide arachodonique
  • AG w3
    non synthétisante par organisme