resp Flashcards

(16 cards)

1
Q

déshydrogénation

A

pertes atomes H (par déshydrogénases)

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2
Q

décarboxylation

A

formation CO2 (par décarboxylases)

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3
Q

phosphorylation

A

ajout groupement phosphate par kinases

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4
Q

types de phosphorylation

A

au niv du substrat: ATP fabriqué par phosphate de substrat directement
oxydative: réactions oxydoréduction + chaine transport e-

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5
Q

navettes = transporteurs d’électrons

A

NAD+
FAD

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6
Q

glycolyse

A

cytosol
oxyder glucose:
réactifs = glucose, 2ATP, 4ADp, 4P, 2NAD+
rendement: 2 pyruvates, 2 ATP + NADH + H+

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7
Q

oxydation du pyruvate

A

matrice mitochondrie
réactifs: pyruvate, CoA (coenzyme), NAD+
bilan(1 pyruvate): 1 CO2, 1 NADH+H+, 1 acétyl-CoA

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8
Q

cycle acide citrique

A

matrice mito
réactifs: oxaloacétate, acétyl-CoA, 3 NAD+. 1 ADP, 1 FAD
bilan(1 acétyl-CoA): 2Co2, 3NADH+H+, 1FADH2, 1ATP

total: 3CO2, 4NADH+H+, 1FADH2, 1ATP

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9
Q

les 2 NADH du cytosol

A

: entrer dans mito par navette
NAD+ ou FAD

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10
Q

phosphorylation oxydative

A

crête mito: chaine de transport e-
Énergie e-:
pomper H+ dans espace intermembranaire

fin de chaine = H2O

chimiosmose: couplage énergétique: É de gradient H+ = permettre phospho oxyd.

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11
Q

É pour NADH+H+ et FADH2

A

N = 2,5 ATP
F = 1,5 ATP

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12
Q

quel élément permet phospho oxyd

A

ATP synthase:
source É = gradient de H+
=production ATP par phospho oxyd.

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13
Q

phospho au niveau du substrat

A

1 glucose:
glycolyse + 2ATP
cycle acide citrique +2ATP

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14
Q

resp.cell.anaérobie?

A

pas O2 comme accepteur terminal e- = sulfate, fer,uranium… =procaryotes

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15
Q

fermentation def

A

-regénérer NAD+
-pas cycle acide c./chaine transport e-
receveur e- = molécule oragnique
reste dans cytosol

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16
Q

types fermentation

A

alcoolique:
après pyruvate: 2ATP, 2 éthanol, 2CO2

lactique:
après pyruvate: 2ATP, 2 lactate