During transcription,
A) non-coding sequences are removed from the RNA transcript.
B) regulatory proteins attach to the DNA at the promotor site.
C) DNA polymerase assembles RNA nucleotides.
D) the entire DNA strand opens up for complete gene transcription.
E) tRNA brings nucleotides to the DNA strand.

Question

Quizplus · Accepted Answer

During transcription, regulatory proteins known as transcription factors attach to the DNA at the promoter site to initiate and regulate gene expression.

Answer: C 
 DNA polymerase is not involved in transcription, but rather in DNA replication. RNA polymerase assembles RNA nucleotides during transcription.

Answers A, D, and E are incorrect:
A) Non-coding sequences are not necessarily removed from the RNA transcript during transcription. 
D) While a portion of the DNA strand must unwind for transcription, the entire strand does not open up for complete gene transcription. 
E) tRNA is not involved in transcription, but rather in translation.

During Transcription