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  • The promoter site and the terminator site for transcription are located at: a. 3′ (downstream) end and 5′ (upstream) end, respectively of the transcription unit b. 5′ (upstream) end and 3′ (downstream) end, respectively of the transcription unit

The promoter site and the terminator site for transcription are located at:

a. 3′ (downstream) end and 5′ (upstream) end, respectively of the transcription unit

b. 5′ (upstream) end and 3′ (downstream) end, respectively of the transcription unit

c. the 5′ (upstream) end

d. the 3′ (downstream) end

Answers (1)

The answer is the option (b) 5' (upstream) end and 3' (downstream) end, respectively, of the transcription unit.

The DNA segment known as the promoter is where RNA polymerase attaches to start transcription. The promoter is located upstream (5' end) of the structural gene in the transcriptional unit about the coding strand.

The DNA sequence where transcription stops is known as the terminator. The terminator is located downstream (3' end) of the structural gene in the transcriptional unit about the coding strand. Hence, (b) is the correct option.

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infoexpert21

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