BM1000 Lecture Notes - Lecture 20: Operon, Cyclic Adenosine Monophosphate, Repressor
Document Summary
Ensures valuble energy is not wasted producing unnecessary resources. Allows unicellular organisms to react quickly to their ever changing environment. Uses many biosynthetic pathway enzymes that are encoded in operons hat can be readily turned on or off as the cell environment changes. Gene regulation is partly controlled by dna binding proteins called transcription factors that can positively or negatively influence the levels of transcription. The iac operon is also controlled by positive regulation. Rna polymerase has low affinity for the iac promotor unless an activator helps. Rna polymerase has low affinity for the iac promotor unless an activator helps it. Cap is activated by camp, which is only present in low glucose. Positive regulation helps bacteria to preferentially use glucose over lactose. Almost all of the cells in the body contain the same dna (genes). Yet there are many different cell types, tissues and organs. Each cell type expresses different genes in perform their specialised functions.
