Because there is no nuclear membrane in prokaryotes,transcription and translation from a single gene can be taking place at the same.

Question

Quizplus · Accepted Answer

In prokaryotes, transcription (the synthesis of RNA from DNA) and translation (the synthesis of protein from RNA) take place simultaneously in the cytoplasm, as there is no separation between the two processes due to the lack of a nuclear membrane. This is different from eukaryotes, where transcription occurs in the nucleus and translation occurs in the cytoplasm.

Because There Is No Nuclear Membrane in Prokaryotes,transcription and Translation