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purpan 2015 qcm 13


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Bonjour, dans l'item A il est dit :"la babouchyl ARNt synthétase catalyse le transfert de Bab sur l'ARNt en 1seule étape enzymatique" et il est dit dans l'énoncé que la babouchyl ARNt synthétase a les même propriétés que les aminoacyl ARNt synthétases, je comprends pas pourquoi cet item est vrai car pour moi il y a bien 2 étapes au transfert de l'aa sur l'ARNt ? 

 

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