Final answer:
The lysogenic cycle is characterized by the stage of lysogeny, in which phage DNA integrates into the host genome and can replicate with it. This process stands in contrast to the immediate replication of viruses in the lytic cycle, where the host cell is destroyed to release new virions.
Step-by-step explanation:
The stage found only in the lysogenic cycle among the options provided is lysogeny. Lysogeny refers to the phase where the viral DNA is incorporated into the host cell's genome and can lie dormant for a period of time, replicating along with the host cell. This is in contrast to the lytic cycle, where after attachment and penetration, the virus immediately hijacks the host cell's machinery to synthesize new viral components, ultimately leading to synthesis of new virus particles, their assembly, and cell lysis during which new virions are released.
Environmental stressors may trigger the prophage (the viral DNA integrated in the host genome) to excise and enter the lytic cycle, leading to the production of new viruses and lysis of the host cell, but lysogeny remains distinct as the quiescent stage where the phage DNA is stably integrated into the bacterial chromosome.