Wednesday, February 14, 2007


What is it?
The DNA Transcription is the process of building RNA copy of a DNA sequence.
Where does it occur?
It occurs in the nucleus of the cell.
When does it happen?
It occurs after DNA replication.
How does it happen?
1. The gene sequence is copied into messenger RNA (mRNA)
- The mRNA is single stranded and has 4 nucleotide like DNA, but instead of Thymine (T) it has Uracil (U).
- Transcription continues until one entire gene has been converted to RNA.
2. After Transcription the whole mRNA strand is transported out of the nucleus to the cytoplasm.
3. In the cytoplasm, the mRNA strand is translated into an amino acid.

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