Glycolyse + fermentation Flashcards

1
Q

Quel est le produit final de la glycolyse en milieu anaérobie?

A

Pyruvate

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2
Q

Quelle réaction donne du NADH,H+? (glycolyse toujours)

A

Glycéraldéhyde 3P en 1,3 Diphosphoglycérate. Enzyme: glycéraldéhyde 3P déshydrogénase

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3
Q

Fermentation lactique

A

Pyruvate => Lactate (forme NAD+)

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4
Q

Enzyme fermentation lactique

A

Lactate déshydrogénase

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5
Q

Variation d’enthalpie libre de la fermentation lactique

A

-25,1 kJ/mol

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6
Q

Trajectoire du Lactate

A

Formé dans les globules rouges => circulation sanguine => foie

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7
Q

Que se passe-t-il au niveau du foie? (Lactate)

A

LDH va reformer pyruvate => régénération NADH,H+ redonne NAD+ au niveau de la chaine respiratoire (en milieu aérobie)

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8
Q

Fermentation alcoolique

A

Pyruvate => acétaldéhyde => éthanol (forme NAD+, libère CO2)

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9
Q

Enzymes fermentation alcoolique

A

PDC: pyruvate décarboxylase
ADH: Alcool déshydrogénase

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10
Q

Trajectoire de l’éthanol

A

Éthanol => foie (détoxification) => réaction inverse : formation acétaldéhyde a partir d’éthanol

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