the virus on beginning the replication cycle, hijacks the host cell and its cellular machinery to make new virus by producing the new replicated viral genome.
Explanation:
The life cycle of virus begins with the replication cycle. The virus gets in alive by acquiring a new host cell or say hijacking the new cell and its cellular machinery. The cellular machinery is then forced in order to perform for the virus itself, and it does so by replicating the viral genome.
The replicated viral genome then makes viral protein which produces new capsids of viruses. These viral particles are then rearranged to form a new virus altogether.