The incorporation of NH₄⁺ into 2-oxoglutarate is the first step in nitrogen assimilation in bacterial cells. This reaction is catalyzed by the enzyme ________ and produces ________.

A) glutamate dehydrogenase (GDH); glutamate
B) glutamine synthase (GS); glutamine
C) glutamate synthase (GOGAT); glutamate
D) 2-oxoglutarate aminase (2-OA); glutamine
E) 2-oxoglutarate dehydrogenase (2-ODH); glutamine