Transcription

Transcription
Key points:
 Transcription is the process in which a gene's
sequence is copied (transcribed) to make an RNA mole
 RNA polymerase is the main transcription enzyme.
Transcription begins when RNA polymerase binds
a promoter sequence near the beginning of a gene (dir
or through helper proteins).
 RNA polymerase uses one of the DNA str
(the template strand) as a template to make a
complementary RNA molecule.
 Transcription ends in a process called termina
Termination depends on sequences in the RNA, which s
that the transcript is finished.

, Introduction
 RNA polymerase is crucial because it carries out transcription
process of copying DNA (deoxyribonucleic acid, the gen
material) into RNA (ribonucleic acid, a similar but more short-l
molecule).
 Transcription is an essential step in using the information
genes in our DNA to make proteins. Proteins are the key molec
that give cells structure and keep them running.
 Transcription is essential to life, and understanding how it wor
important to human health. Let's take a closer look at w
happens during transcription.

, Transcription overview

 Before transcription can take place, the DNA double
helix must unwind near the gene that is getting
transcribed. The region of opened-up DNA is called a
transcription bubble.



 Image below outline the process