what is its regulation?
A cell regulates its gene expression depending on its external environment, its internal environment, and its specific role if in a multicellular organism
Gene
 A cell regulates its gene expression depending on its external environment (e.g. available nutrients, temperature and other stresses), its internal environment (e.g. cell division cycle, metabolism, infection status), and its specific role if in a multicellular organism. Gene expression can be regulated at any step: from transcriptional initiation, to RNA processing, to post-translational modification of the protein.
dna that contains genes from more than one source is called UNANSWERABLE what does 'gene' means? A sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein what is its purpose? The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic trait. what are some of the essential ones? Housekeeping genes
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Gene [SEP] Regulation
Genes are regulated so that they are expressed only when the product is needed, since expression draws on limited resources. A cell regulates its gene expression depending on its external environment (e.g. available nutrients, temperature and other stresses), its internal environment (e.g. cell division cycle, metabolism, infection status), and its specific role if in a multicellular organism. Gene expression can be regulated at any step: from transcriptional initiation, to RNA processing, to post-translational modification of the protein. The regulation of lactose metabolism genes in "E. coli" ("lac" operon) was the first such mechanism to be described in 1961.