In the lysogenic cycle of phages, __________.

• A. the nucleic acid core of the phage is all that enters the host cell
• B. only a small number of the viral genes are expressed
• C. the viral nucleic acid inserts itself into the host chromosome
• D. the viral nucleic acid is replicated along with the host DNA
• E. All of the listed responses are correct.

Answer: (E)

Verified step by step guidance

1. Understand the lysogenic cycle: It is a phase in the life cycle of some viruses, particularly bacteriophages, where the viral DNA integrates into the host cell's genome and replicates along with it without causing immediate harm to the host.
2. Recognize that during the lysogenic cycle, the nucleic acid core of the phage enters the host cell. This is the initial step where the viral genetic material is introduced into the host.
3. Identify that only a small number of viral genes are expressed during the lysogenic cycle. This limited expression allows the virus to remain dormant within the host cell without causing immediate lysis.
4. Note that the viral nucleic acid inserts itself into the host chromosome. This integration is a key characteristic of the lysogenic cycle, allowing the viral DNA to be replicated along with the host's DNA during cell division.
5. Understand that the viral nucleic acid is replicated along with the host DNA. This replication occurs as the host cell divides, ensuring the viral DNA is passed on to daughter cells without disrupting normal cellular functions.