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  4. Which defines the position and presence of template and coding strands in transcription unit?

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Q. Which defines the position and presence of template and coding strands in transcription unit?

Molecular Basis of Inheritance

Solution:

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