Yes, this is a fixed operation step of chemical labeling and cannot be changed casually.

Chemistry is a natural science that studies the composition, structure, properties and changing laws of substances at the atomic level, which is also the core basis of chemical changes.

Chemistry is one of the important basic sciences and a subject based on experiments. In the mutual infiltration with physics, biology, geography, astronomy and other disciplines,

Its rapid development has promoted the development of other disciplines and technologies.

For example, the research results of nucleic acid chemistry have raised biology from cellular level to molecular level and established molecular biology.