(1) (genetics) A segment of DNA where the repressor binds to, thereby preventing the transcription of certain genes. (2) (surgery) The one performing surgical procedures. (Genetics) In the Operon Model, the operator is the gene in which a repressor binds. This results in the prevention of the RNA polymerase from binding to it, thus, preventing the expression of certain genes in the operon unit. Word origin: Latin operÄ ( rÄ« ) (to work, effect).
Newton's first law states that an object at rest will stay at rest unless acted on by an unbalanced external force.. This concept is commonly referred to as inertia and was first hypothesized by Galileo Galilei in the late 1500s.
Quantitatively, Newton's second law predicts that when there is an unbalanced force on an object or system, resulting acceleration will be directly proportional to the net force while inversely proportional to the object or system mass.F net = (m system)a (Eq. 1).hat is, the object will have an acceleration (change in velocity). This is the basis for Newton's Second Law of Motion. Newton's Second Law deals with the relationship between cause and effect: what causes an object to change its motion (the effect).