Which of the following is the midpoint of a lytic replication cycle

Which of the following is the midpoint of a lytic replication cycle?
A)entry
B)synthesis
C)attachment
4)release

A standard list of the steps of a virus lytic life cycle are:

1. Attachment (to the surface of the cell)
2. Entry (into the cell)
3. Synthesis (of new viral proteins and genome copies)
4. Assembly (of new virus particles)
5. Release (lysis of the cell)

So synthesis would be the midpoint. You can read more about the viral lytic cycle here http://en.wikipedia.org/wiki/Lytic_cycle