What would cells want to keep some particles in homeostasis and others in equilibrium?

cells need ATP to absorb nutrients into their semi permeable cell wall..or cytoplasm.

Explanation:

the cell can "so to speak" absorb the needed nutrients and block nutrients that are not needed. this is to enforce homeostasis, that the body stays within certain boundries... which is the definition of homeostasis..

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides