What Is Transcription?

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Regina Bailey

** What Is Transcription? **

By Regina BaileyJuly 10, 2010

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DNA Codes For Proteins
Image: Genome Management Information System, Oak Ridge National Laboratory

DNA transcription is a process that involves the transcribing of genetic
information from DNA to RNA. The transcribed DNA message is used to produce
proteins. DNA is housed within the nucleus of our cells. It controls
cellular activity by coding for the production of enzymes and proteins. The
information in DNA is not directly converted into proteins, but must first
be copied into RNA. This ensures that the information contained within the
DNA does not become tainted.

There are three main steps to the process of DNA transcription.

· RNA polymerase binds to DNA.

· RNA polymerase transcribes a single strand of DNA into a single stranded
RNA polymer called messenger RNA (mRNA).

· RNA polymerase releases the mRNA polymer and detaches from the DNA.

A single DNA sequence can be transcribed by many RNA polymerase molecules
at once. As a result, proteins can be manufactured in large quantities.
Once the mRNA polymer is created, it crosses the


Source: biology.about.com/b/2010/07/10/what-is-transcription.htm


what is transcription

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