Retroviruses and reverse transcriptase were discovered by

Options

A. Sinsheimer
B. Stanley
C. Temin and Baltimore
D. Hershey and Chase

Answer

To answer the question regarding who discovered retroviruses and reverse transcriptase, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Retroviruses**:
- Retroviruses are a type of virus that uses RNA as their genetic material. They are unique because they can convert their RNA into DNA within a host cell.

2. **Role of Reverse Transcriptase**:
- Reverse transcriptase is the enzyme responsible for this conversion of RNA into DNA. This process is essential for the replication of retroviruses.

3. **Identifying the Discoverers**:
- The discovery of retroviruses and the enzyme reverse transcriptase is attributed to two scientists: David Baltimore and Howard Temin.
- Howard Temin was a Japanese scientist, while David Baltimore was an American virologist.

4. **Conclusion**:
- Therefore, the correct answer to the question is that retroviruses and reverse transcriptase were discovered by Temin and Baltimore.

### Final Answer:
The correct answer is Temin and Baltimore.

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