Q. Which one of the following is not a part of a transcription unit in DNA?
(a) The inducer
(b) A terminator
(c) A promoter
(d) The structural gene
Solution :
Correct option : A 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.