Given a scientific question, generate a correct answer to it.
One example: Who proposed the theory of evolution by natural selection?
Solution is here: darwin
Explanation: This is a direct fact that Charles Darwin proposed the theory of evolution.

Now, solve this: Prokaryotic cells do not have a nucleus but instead generally have a single chromosome, a piece of double-stranded dna located in an area of the cell called the what?
Solution:
nucleoid