Bacteriophages are generally:

Options

A. ss DNA viruses
B. ds DNA viruses
C. ss RNA viruses
D. ds RNA viruses

Answer

**Step-by-Step Solution:**

1. **Understanding Bacteriophages**: Bacteriophages, often referred to as phages, are viruses that specifically infect bacteria. They attach to bacterial cells and utilize the host's cellular machinery to replicate themselves.

2. **Identifying Genetic Material**: The question asks about the type of genetic material that bacteriophages generally possess. Bacteriophages can have various types of genetic material, but the majority are known to have double-stranded DNA.

3. **Analyzing Options**:
- **Option 1: Single-stranded DNA virus** - This is incorrect as most bacteriophages do not contain single-stranded DNA.
- **Option 2: Double-stranded DNA virus** - This is correct as it aligns with the fact that the majority of bacteriophages contain double-stranded DNA.
- **Option 3: Single-stranded RNA virus** - This is incorrect because bacteriophages do not typically contain RNA.
- **Option 4: Double-stranded RNA virus** - This is also incorrect as bacteriophages are not known to have double-stranded RNA.

4. **Conclusion**: Based on the analysis of the options, the correct answer is **Option 2: Double-stranded DNA virus**.

---