Coliphage `phi xx 174` virus contains

Options

A. Singla stranded RNA
B. Double stranded RNA
C. Single stranded DNA
D. Doule stranded DNA

Answer

To answer the question regarding what the Coliphage φX174 virus contains, we can break down the information step by step:

### Step-by-Step Solution:

1. **Identify the Virus**: The question specifies "Coliphage φX174". This is a type of bacteriophage, which is a virus that infects bacteria, specifically Escherichia coli (E. coli).

2. **Understand the Genetic Material**: The options provided are:
- Single-stranded RNA
- Double-stranded RNA
- Single-stranded DNA
- Double-stranded DNA

3. **Research on Coliphage φX174**: Coliphage φX174 is known for its unique genetic structure. It is essential to know the type of nucleic acid it contains.

4. **Determine the Correct Type of Nucleic Acid**: Coliphage φX174 is characterized by having a single-stranded DNA (ssDNA) genome. This was a significant discovery in virology.

5. **Historical Context**: The sequencing of the φX174 genome was the first instance of a DNA-based genome being sequenced, completed by Frederick Sanger and his team in 1977. This highlights its importance in molecular biology.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is that Coliphage φX174 contains single-stranded DNA.

### Final Answer:
**Coliphage φX174 virus contains single-stranded DNA.**

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