Réplication de l'ADN Flashcards

1
Q

Par qui sont stabilisés les simples brins D’adn pendant la réplication

A

SSB

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2
Q

Role Topoisomérases

A

Stabilise le pas de l’hélice d’ADN en coupant un brin d’ADN et reconstitue l’ADN après rotation

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3
Q

Role Hélicase

A

Ouverture de la double hélice par séparation des 2brins d’ADN et formation d’une boucle de réplication

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4
Q

Cofacteur ADN ligase

A

ATP

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5
Q

CofacteurARN polymérase

A

GTP

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6
Q

Cofacteur eIF2

A

GTP

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7
Q

Cofacteur eIF4

A

ATP

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8
Q

Cofacteur eEF1

A

GTP

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9
Q

Cofacteur eEF2

A

GTP

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10
Q

Bilan NRJétique traduction

A

4 liaisons/AA: -2 AA sur ARNt (ATP->AMP) -1 ARNt-AA sur site A (GTP->GDP)- 1 translocation chaine (GTP->GDP)

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11
Q

Bilan NRJétique transcription

A

2 liaisons/nucléotides

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12
Q

SpécificitéARN polymérase I

A

ARNr (sauf le 5s)

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13
Q

Spécificité ARN polymérase II

A

Transcrit primaire qui est maturé en ARNm –> proteines

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14
Q

SpécificitéARN polymérase III

A

ARN: - t- sn- r 5S- 7S

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15
Q

Role ADN polymérase bêta

A

Réparation de l’ADN

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16
Q

Role ADN polymérase gamma

A

Réplication de l’ADN mitochondrial

17
Q

Ose différence ADN/ARN

A

ADN : 2’ H