A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end;
- Repressor, Operator gene, Structural gene
- Structural gene, Transposons, Operator gene
- Inducer, Repressor, Structural gene
- Promoter, Structural gene, Terminator
Answer
(4) Promoter, Structural gene, Terminator
Solution
A transcription unit in DNA is defined by three regions: a promoter (towards the 5' end, upstream of the structural gene), the structural gene, and a terminator (towards the 3' end, downstream of the coding strand).
Answer: (4)