If you are well prepared for the laboratory, it is much less likely that an accident will occur. In the laboratory, you are responsible not only for your safety, but also for the safety of your classmates. If an accident happens because you are not prepared, it can also affect your friends. This is all the more reason for you to take the time and make the effort to prepare for the laboratory. Be sure to note the safety warnings listed in the Safety section of each experiment.
Fusion Splicing. Fusion splicing is the process of fusing or welding two fibers together usually by an electric arc. Fusion splicing is the most widely used method of splicing as it provides for the lowest loss and least reflectance, as well as providing the strongest and most reliable joint between two fibers. Virtually all singlemode splices are fusion.
RNA splicing is the removal of non-coding introns and the joining of exons by spliceosomes. The presence of introns is thought to assist gene regulation by way of complex methods like alternative splicing. After splicing, a 5' cap and a poly(A) tail are added, and this 'final draft' is called mature mRNA. Splicing, capping, and tailing comprise RNA processing in the nucleus. Once the mature mRNA moves into the cytoplasm, it begins translation and undergoes other forms of gene regulation.