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NEETZoologyMolecular Basis of Inheritance

Where is the promoter located in a transcription unit?

Options

  1. ATowards the 3' -end
  2. BTowards the 5' -end
  3. CTowards the center
  4. DNone of the above

Correct answer

B. Towards the 5' -end

Step-by-step solution

The promoter and terminator flank the structural gene in a transcription unit. The promoter is said to be located towards the 5' -end (upstream) of the structural gene (the reference is made with respect to the polarity of the coding strand). It is a DNA sequence that provides binding site for RNA polymerase, and it is the presence of a promoter in a transcription unit that also defines the template and coding strands. By switching its position with terminator, the definition of coding and template strands could be

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