Gene Expression: Overview of Control - Research Article from Macmillan Science Library: Genetics

This encyclopedia article consists of approximately 8 pages of information about Gene Expression.
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The Flow of Genetic Information from Genes to Proteins

Cells can regulate gene expression at every step along the way, from DNA to the final protein, as shown in Figure 1. Genetic information in DNA is first copied to form an RNA molecule, in a process known as transcription. The RNA used to make proteins is called messenger RNA (mRNA) because it carries information from the DNA to the ribosome, where protein synthesis occurs.

The mRNA serves as a template to guide protein synthesis. Scientists refer to protein synthesis as "translation" because ribosomes translate an mRNA sequence into a protein sequence. Prokaryotic cells use the mRNA directly as a template for protein synthesis.

Eukaryotic cells, however, must modify the precursor mRNA in several ways before it can be used to guide protein synthesis. The two ends are chemically altered, and sections of the RNA that do...

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This section contains 2,218 words
(approx. 8 pages at 300 words per page)
Buy the Gene Expression: Overview of Control Encyclopedia Article
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Macmillan Science Library: Genetics
Gene Expression: Overview of Control from Macmillan Science Library: Genetics. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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