Final answer:
Transcription occurs in the nucleus of eukaryotic cells where a segment of DNA is copied into mRNA. The mRNA then moves to the cytoplasm for translation at the ribosome.
Step-by-step explanation:
Where in the Cell Does Transcription Take Place:
During the process of transcription, a particular segment of DNA is copied into RNA, specifically mRNA, by the enzyme RNA polymerase. This process is crucial as it is the first step in the expression of genes into proteins. Transcription takes place in the nucleus of eukaryotic cells. Here, the DNA double helix is unwound, and one of its strands is used as a template for synthesizing messenger RNA (mRNA).
Once the mRNA is synthesized, it then exits the nucleus and moves to the cytoplasm of the cell, where it will be used during translation to assemble proteins. In eukaryotic cells, the transcription and translation processes are spatially separated: transcription occurs in the nucleus, whereas translation occurs in the cytoplasm, with the ribosome being the site of translation. It is interesting to note that in prokaryotic cells which lack a nucleus transcription and translation can take place almost simultaneously in the cytoplasm.
In summary the answer to the schoolwork question is: a. Nucleus