Are microscopic organisms called phytoplankton.

No. Microscopic organisms are not called phytoplankton, the are called microorganisms.

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.

It would be 232.4242