Phages that show lysogenic sycle are called

Options

A. Lytic phages
B. Temperate phages
C. Virulent phages
D. Avirulent phages.

Answer

### Step-by-Step Solution:

1. **Understanding Phages**:
- Phages, or bacteriophages, are viruses that specifically infect bacteria. They can exhibit different types of life cycles, primarily the lytic cycle and the lysogenic cycle.

2. **Defining the Lysogenic Cycle**:
- In the lysogenic cycle, the phage integrates its genetic material into the host bacterium's DNA. This allows the phage to replicate along with the bacterial DNA without immediately destroying the host cell.

3. **Identifying Phage Types**:
- Phages can be categorized based on their life cycles. The two main types are:
- **Lytic Phages**: These phages cause the host cell to lyse (break open) and release new phage particles quickly.
- **Temperate Phages**: These phages can enter a lysogenic cycle, integrating their DNA into the host genome and replicating without causing immediate harm.

4. **Conclusion**:
- The question asks for the type of phages that show the lysogenic cycle. The correct answer is **temperate phages**. They can switch between the lytic and lysogenic cycles, but they are specifically known for their ability to integrate into the host DNA and remain dormant for a period.

### Final Answer:
Phages that show the lysogenic cycle are called **temperate phages**.

---