Question

- Part Which of the following statements about eukaryotic transcription is false? View Available Hint(s) Transcription initiation occurs when RNA polymerase binds to a complex of transcription factors at the TATA box Submit о Eukaryotic promoter regions contain a TATA box and a CAAT box A polycistronic mRNA may be transcribed if the gene products are used in the same pathway or needed at the same time. 04 The transcripts produced contain both exons and introns Submit

Answer 1

Which of the following statements about eukaryotic transcription is false?

A polycistronic mRNA may be transcribed if the gene products are used in the same pathway or needed at the same time.

FALSE: Eukaryotes generally do not contain polycistronic mRNA. It is a characteristic of prokaryotes. Therefore, this is the correct answer.

Transcription initiation occurs when RNA polymerase binds to a complex of transcription factors at the TATA box.

TRUE: Several transcription factors are required for efficient transcription initiation in eukaryotes, these factors help DNA polymerase to bind to the promoter region to form the pre-initiation complex at the TATA box.

Eukaryotic promoter regions contain a TATA box and a CAAT box.

TRUE: TATA box is the site of the pre-initiation complex in eukaryotes where several transcription factors bind to carry out transcription. Eukaryotes also have what is known as CAAT box, which is essentially a regulatory promoter region that is required to increase transcription levels.

The transcripts produced contain both exons and introns.

TRUE: Transcription in eukaryotes produce a pre-mRNA that contains both coding regions called Exons and noncoding regions called Introns. For protein synthesis to take place, noncoding introns are first removed from the sequence splicing.