(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.
Why Newtonâs first law is sometimes called the law of inertia? A.)Because inertia is the same thing as friction. B.)Because inertia is the tendency of objects to resist changes in their motions. C.)Because inertia describes the application of force to an object in motion. D.)Because inertia describes the application of force to an object at rest.