âGaining confidence, one 160-foot fall at a time.â Thatâs how Canada-based organization 9 Lives Adventures describes bungee jumping for the wheelchair-bound.n their blog, 9 Lives founder Karim Ladki explains wheelchairs keep jumpers upright and prevent blood from rushing to the head. Wheelchair-bound jumpers also have a special bungee cord that attaches to the chairâs axles.
lac - resinlike substance secreted by certain lac insects; used in e.g. varnishes and sealing wax. seal, sealing wax - fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters. shellac varnish, shellac - a thin varnish made by dissolving lac in ethanol; used to finish wood. animal product - a product made from animal material.
The lac operon, an inducible operon, is a mechanism used by bacterial cells as an economical means to restrict the expression of the structural genes necessary for metabolizing lactose, a disaccharide. These structural genes break down lactose when lactose is the best carbon source available within its environs.hen glucose is present, the CRP does not bind to the promoter and expression of the lac operon remains low even if lactose is present. However, when glucose is absent, the CAP binds to the promoter region and promotes transcription. Glucose does not directly regulate the binding of CRP. A cAMP-CRP complex is entailed.