Polymerase 1 (Pol I) is an enzyme responsible for synthesizing ribosomal RNA (rRNA) in eukaryotic cells. If Pol I lacks activity, it is not given a specific name.

Here's why:

* "Inactive" is the most appropriate description: Pol I can be inactive due to various reasons, such as mutations, lack of essential cofactors, or inhibitors.

* No specific term for inactive Pol I: Unlike some other enzymes with specific terms for inactive forms (e.g., proenzyme, zymogen), there's no established term for inactive Pol I.

Therefore, simply stating "inactive Pol I" is the most accurate and commonly understood way to describe a polymerase 1 enzyme without activity.