Which one of the following is not a part of a transcription unit in DNA?

Which one of the following is not a part of a transcription unit in DNA?
  1. The inducer
  2. A terminator
  3. A promoter
  4. The structural gene

Solution

Transcription of DNA results in a mRNA encoding at least one gene. The mRNA however, serve as a template for protein synthesis through translation. Transcription unit is a specific section of DNA which is transcribed into mRNA. The transcription unit has three main parts; a promoter, a structural gene and a terminator. Thus, the correct answer is option A.

Asked in: NEET 2012 (Screening)

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