The stretch of DNA that is transcribed into an RNA molecule is called transcription unit. Transcription has some proofreading mechanisms, but they are fewer and less effective than the controls for DNA; therefore, transcription has a lower copying fidelity than DNA replication.ut to answer your question to the point, only one strand of DNA is copied during transcription for practical reasons. The one strand that is copied will result to a duplicate copy of the other strand that WAS NOT copied.
Breakout Cable A type of Fiber optic Cable containing several fibers, each with its own Jacket and all of them surrounded by one common jacket. Breakout cables are designed for convenient installation of Fiber Optic Connectors but tend to have high Transmission losses due to bends in the fibers.
Necessity is the mother of invention in such related fields as electrical and electronic wiring. These two separate but equal fields use the same basic concept--connecting one source or signal to many devices. The technology is known as the breakout box. In both electrical design and electronic design there will often come a time when a multitude of units need to be attached to one line of voltage. In electrical work, for instance, there may be a need to install four power outlets but hook them to one line of voltage.