Question

homework - protein synthesis
where does transcription occur?
on a ribosome
in the nucleus
in the cytoplasm
on the mitochondria

Explanation:

Transcription is the process of copying a segment of DNA into RNA. In eukaryotic cells, DNA is located in the nucleus. So, transcription occurs in the nucleus. Ribosomes are involved in translation (protein synthesis from mRNA). The cytoplasm is where translation (in part) and other cellular activities happen. Mitochondria have their own DNA and can do some transcription but the main transcription (for most of the cell's genetic information) occurs in the nucleus.

Answer:

in the nucleus