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NEETZoologyMolecular Basis of Inheritance

In a transcription unit, the promoter and terminator flank the structural gene. If the positions of the promoter and terminator are hypothetically interchanged, what will be the direct consequence on the transcription unit?

Options

  1. AThe process of transcription will stop completely
  2. BThe polarity of the structural gene will change from 3' 5' to 5' 3'
  3. CThe RNA polymerase will bind to the terminator sequence instead
  4. DThe definition of the coding and template strands will be reversed

Correct answer

D. The definition of the coding and template strands will be reversed

Step-by-step solution

According to NCERT, it is the presence of a promoter in a transcription unit that defines the template and coding strands. By switching its position with the terminator, the definition of coding and template strands is reversed. The strand that was previously acting as the template will now become the coding strand, and vice versa. Answer: The definition of the coding and template strands will be reversed

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