Biology 1002B Chapter Notes - Chapter 14: Regulatory Sequence, Operon, Cytogenetics
6 Mar 2017
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Biochemical and cytogenetic analyses have shown that all nucleated cells of a developing embryo retain essentially the same set of genes that was created in the original single- celled zygote at fertilization. Structural and functional differences in cell types result from the presence or absence of the products resulting from expression of genes. When a gene is turned on, it"s more likely to be transcribed actively. The expression of gene products is subject to further controls affecting the processing of. Rna, possible translation into protein, and the activity of the product itself. 14. 1 regulation of gene expression of prokaryotic cells. Transcription and translation are closely regulated in prokaryotic cells. Prokaryotic organisms tend to be single celled and relatively simple, with generation times measured in minutes. Prokaryotic cells typically undergo rapid and reversible alterations in biochemical pathways that allow them to adapt quickly to changes in their environment.
