Reverse transcription was first shows by

Options

A. Temin and Baltimore
B. Delbruck and Luria
C. Jacob and Monod
D. Harshey and chase

Answer

To solve the question "Reverse transcription was first shown by," we will analyze the contributions of the scientists mentioned in the options and determine who first demonstrated reverse transcription.

### Step-by-Step Solution:

1. **Understanding Reverse Transcription**:
- Reverse transcription is the process of synthesizing DNA from RNA. This is the opposite of the usual flow of genetic information as described by the central dogma, which states that DNA is transcribed into RNA, and then RNA is translated into proteins.

2. **Identifying the Scientists**:
- The question provides four pairs of scientists:
- Tamin and Baltimore
- Delbruck and Luria
- Jacob and Monod
- Hershey and Chase

3. **Analyzing Each Pair**:
- **Tamin and Baltimore**: They are known for discovering the enzyme reverse transcriptase, which catalyzes the formation of DNA from RNA. This is directly related to reverse transcription.
- **Delbruck and Luria**: They studied genetic mutations in bacteria and did not focus on reverse transcription.
- **Jacob and Monod**: They worked on the lac operon and gene regulation, which is not related to reverse transcription.
- **Hershey and Chase**: They conducted experiments that confirmed DNA as the genetic material, but they did not demonstrate reverse transcription.

4. **Conclusion**:
- Based on the contributions of these scientists, the correct answer to the question is that reverse transcription was first shown by **Tamin and Baltimore**.

### Final Answer:
Reverse transcription was first shown by Tamin and Baltimore.

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