Q166 / 200 · NEET 2003 · Zoology

During transcription, the DNA site at which RNA polymerase binds is called:

  • Correct answer
    A
    promoter
  • B
    regulator
  • C
    receptor
  • D
    enhancer

Solution

Promoter region is the proximal area of transcription unit, which provides site for attachment of transcription factors ( $\sigma$ factor) and RNA polymerasc. It is present upstream at 5' end of coding strand. It has special structure; an AT rich area called TATA box or Pribnow box.

Hence, the correct answer is option: 'A'.

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