NEET 2024 · BiologyPrevious Year Question
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.
Answer: (C) Promotor, Structural gene, Terminator. Answer: (C) Promotor, Structural gene, Terminator.
- A.Structural gene, Transposons, Operator gene
- B.Inductor, Repressor, Structural gene
- C.Promotor, Structural gene, Terminator✓
- D.Repressor, Operator gene, Structural gene
Correct Answer
(C) Promotor, Structural gene, Terminator
Solution & Explanation
Answer: (C) Promotor, Structural gene, Terminator. A transcription unit is defined by three regions: the promoter (5'/upstream), the structural gene, and the terminator (3'/downstream). NCERT Ch 5, p.91, lines 040-044: "A transcription unit in DNA is defined primarily by the three regions in the DNA: (i) A Promoter (ii) The Structural gene (iii) A Terminator."
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