Where does transcription occur in the cell?

Where does transcription occur in the cell?

• A. DNA is used to create mRNA copy; occurs in the nucleus; 'copying instructions from DNA'
• B. DNA is used to synthesize proteins in ribosomes
• C. DNA is replicated to produce two identical DNA molecules
• D. RNA is used to create DNA in the nucleus

Answer: (A)

Transcription is the process of copying the information in DNA into an RNA molecule, and in eukaryotic cells this happens in the nucleus where the DNA is housed. RNA polymerase reads the DNA template and builds a complementary RNA strand, which becomes mRNA after processing and then moves to the cytoplasm for translation. This aligns with the idea of using DNA to create an RNA copy and locating the work in the nucleus, i.e., copying instructions from DNA to RNA. The other descriptions mix up steps: making proteins in ribosomes describes translation, not transcription; replicating DNA describes DNA replication, not transcription; and RNA making DNA is reverse transcription, a different process.

Transcription is the process of copying the information in DNA into an RNA molecule, and in eukaryotic cells this happens in the nucleus where the DNA is housed. RNA polymerase reads the DNA template and builds a complementary RNA strand, which becomes mRNA after processing and then moves to the cytoplasm for translation.

This aligns with the idea of using DNA to create an RNA copy and locating the work in the nucleus, i.e., copying instructions from DNA to RNA.

The other descriptions mix up steps: making proteins in ribosomes describes translation, not transcription; replicating DNA describes DNA replication, not transcription; and RNA making DNA is reverse transcription, a different process.