Question

Which of the following describes the process seen in the image above?

• A. The TATA box is used as a signal for the termination of transcription.
• B. The enhancer region is upstream from the binding site of RNA polymerase which allows transcription factors to bind and initiate transcription.
• C. The enhancer region acts to loop up DNA and therefore, silence gene expression.
• D. The TATA region of the DNA is known as the promoter, which signals DNA polymerase to start transcribing.

Answer 1

The correct option is D The TATA region of the DNA is known as the promoter, which signals DNA polymerase to start transcribing.

Transcription is the synthesis of RNA from DNA one of the two strands of DNA takes part in the transcription.

Transcription takes place at anti strand or negative strand of DNA.

There are three regions on the transcription unit named the promoter, structural gene and Terminator. The promoter is situated upstream of the structural gene at 5' end of coding strand whereas Terminator is present at downstream of structural genes at 3' end of the coding strand.

The promoter contains AT-rich regions which are known as Tata box Tata box has a group for the attachment of specific proteins. Tata box is also known as per Pribnow box.

So, the correct option is 'The TATA region of the DNA is known as the promoter, which signals DNA polymerase to start transcribing.'