The coding region of a gene is that portion of a gene's DNA or RNA, composed of exons, that codes for protein. The coding region of an organism is the sum total of the organism's genome.

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Coding region and noncoding region

The region of chromosome that is generally thought of as the unit of function is the "gene". Genes are composed of both a "coding region"--that sequence that tells the cell's machinery what the protein will be--and a "regulatory" region, which tells the cell when to turn on the coding region to make the protein.

Yes. Pal and NTSC.