When a newly formed cell enters into interphase and begins conducting metabolic functions, it is in

When a newly formed cell enters into interphase and begins conducting metabolic functions it is in G1. The G1 phase is the first of four phases that take place during cell division of eukaryotic cells. 

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.