In nucleus , what tell cells what to do and how to change

Explanation:

Storing DNA is the main function of the nucleus. DNA is like the instructions that tell a cell how to be a cell. It holds our genetic information and all of the instructions for how a cell should function. The DNA in the nucleus is wrapped around proteins, forming a structure called chromatin.

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.