Which of the Following Occurs When the Heptapeptide Repeat in the Carboxy

question 22

Multiple Choice

Which of the following occurs when the heptapeptide repeat in the carboxy terminal domain in the RPB1 subunit of RNA polymerase II is phosphorylated?

• A)conversion to an elongation complex
• B)binding to DNA
• C)formation of a holo-RNA polymerase II
• D)initiation of transcription

---

Definitions:

Posttranscriptional

Pertains to the alterations and processes that RNA molecules undergo after they are transcribed from DNA but before they are translated into proteins.

Transcriptional

Pertaining to transcription, the process by which genetic information from DNA is copied to messenger RNA.

Operon

Group of structural and regulating genes that function as a single unit.

Transposons

DNA sequences that can change their position within the genome, sometimes creating or reversing mutations and altering the cell's genome size.