| | Re: Question on Enzymes
Lactose operon induction principle (the central dogma) DNA RNA protein replication transcription and translation reverse transcription of RNA replication gene expression (gene expression) - gene transcription and translation process. Generating a variety of RNAs (tRNA, mRNA, rRNA) and various protein polypeptide chain. RNA (tRNA, mRNA, and rRNA gene expression according to the biological reaction of the internal and external environmental stimuli, gene expression in a manner divided into: constitutive expression induction and repression of expression of constitutive Gene expression at any stage of ontogeny can in most sustained gene expression in the cells, regardless of the expression level is high or low, it is less affected by environmental factors, or very little change, and the gene expression product is usually necessary, the life processes essential, such genes often referred to as housekeeping genes (housekeeping gene). induction (induction): in the stimulation of specific environmental signal, the corresponding gene is activated, so that the gene expression product increase this type of gene known as inducible gene. can induce gene expression in specific environments enhanced process called induction (induction).