The organelle that is responsible for the production of ribosomes is
Member of the American Chemical Society (ACS). Nucleolus is where ribosomes are assembled. The nucleolus is also in charge of transcribing and modifying rRNA. However the nucleolus is not an organelle but a space in the nucleus which is actively producing ribosome units.he nucleolus is also in charge of transcribing and modifying rRNA. However the nucleolus is not an organelle but a space in the nucleus which is actively producing ribosome units.