A bacteriophage possesses an enzyme

Options

A. reverse transcriptase
B. Urease
C. Dehydrogenase
D. Lysozyme.

Answer

**Step-by-Step Solution:**

1. **Understanding Bacteriophages**: Bacteriophages are viruses that specifically infect bacteria. They consist of genetic material, which is usually double-stranded DNA, surrounded by a protein coat known as a capsid.

2. **Identifying the Enzyme**: The question asks about the enzyme present in bacteriophages. One important enzyme associated with some bacteriophages is reverse transcriptase.

3. **Function of Reverse Transcriptase**: Reverse transcriptase is an enzyme that synthesizes DNA from an RNA template. This process is known as reverse transcription. In the context of bacteriophages, this enzyme allows the viral RNA to be converted back into DNA, which can then be integrated into the host bacterium's genome.

4. **Comparison with Other Enzymes**: While there are other enzymes like urease, dehydrogenase, and lysozyme, these are not typically associated with bacteriophages. Urease is involved in the urea cycle, dehydrogenase is involved in oxidation-reduction reactions, and lysozyme helps break down bacterial cell walls. None of these are relevant to the function of bacteriophages.

5. **Conclusion**: Therefore, the correct answer to the question about the enzyme present in a bacteriophage is reverse transcriptase.

**Final Answer**: The enzyme present in a bacteriophage is reverse transcriptase.

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