Final answer:
In a bacterium, the region of the cytoplasm where the compacted chromosome is located is called the nucleoid.
Step-by-step explanation:
The region of the cytoplasm in a bacterium where the compacted chromosome is located is called the nucleoid. There is no nucleus in a bacterium, and the single, circular chromosome exists in the nucleoid region, which is a condensed area of DNA found within prokaryotic cells.