This is a bit of a trick question! Prokaryotic cells are the cells of prokaryotes, which are single-celled organisms.

Here's why it's tricky:

* Prokaryotes are entire organisms: They are not found within other cells like eukaryotic organelles are.

* Prokaryotes are found everywhere: They are incredibly diverse and can be found in soil, water, the air, and even inside other organisms.

So, instead of asking where prokaryotic cells are found in a cell, it's more accurate to ask where are prokaryotes found?