Early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. in which stage of the cell cycle is this process reversed?

During the last stage of mitosis (telophase), the nucleus membrane reappears around the two groups of chromosomes created. Thus forming two nucleoli (two nucleus). I hope this helped, this is what i have from notes i took for that subject last year.

The basic building blocks of dna and rna are nucleotides