active repressor n.
A repressor that binds directly with an operator gene to block it and its structural genes from synthesizing enzymes; it is a homeostatic mechanism for the regulation of inducible enzyme systems.
- Active safety
noun the practice of taking measures to avoid accidents, as opposed to merely reducing their consequences Compare passive safety
- Active service
the status of full-time service: on active duty. Contemporary Examples The Chinese military has a new stealth jet, but what messages are they sending as it is prepared for active service? Beijing’s New Stealth Jet: Made in China Brendon Hong November 15, 2014 Style-wise, there has perhaps been just one outfit that could be described […]
- Active server pages
active server pages World-Wide Web, programming (ASP) A scripting environment for Microsoft Internet Information Server in which you can combine HTML, scripts and reusable ActiveX server components to create dynamic web pages. IIS 4.0 includes scripting engines for Microsoft Visual Basic Scripting Edition (VBScript) and Microsoft JScript. ActiveX scripting engines for Perl and REXX are […]
- Active site
the part of an enzyme that interacts with the substrate during catalysis. active site n. The part of an enzyme molecule at which catalysis of the substrate occurs. active site The part of an enzyme where the catalytic activity on the substrate takes place. See more at enzyme. The part of an enzyme or antibody […]
- Active sun
the sun at a maximum of solar activity, occurring every 11 years. solar activity, superimposed on an unchanging background.