Waksman isolated

Options

A. actinomycin
B. streptomycin
C. both (1) and (2)
D. penicillin

Answer

**Step-by-Step Solution:**

1. **Identify the Key Figure**: The question asks about Waksman, who is a significant figure in microbiology. He is known for his work in isolating antibiotics.

2. **List the Antibiotics Associated with Waksman**:
- Actinomycin (also known as Actinomycin D)
- Streptomycin

3. **Research Actinomycin**:
- Actinomycin D was the first antibiotic shown to have anti-cancer activity.
- It was isolated by Selman Waksman and his co-worker H. Boyd Woodruff in 1940.

4. **Research Streptomycin**:
- Streptomycin was discovered by Selman Waksman in 1952.
- It is effective against tuberculosis and contributed to Waksman receiving a Nobel Prize in Physiology or Medicine.

5. **Evaluate the Other Options**:
- Penicillin is mentioned but was discovered by Alexander Fleming, not Waksman. Therefore, it does not belong in the context of Waksman’s discoveries.

6. **Conclusion**:
- The correct answer to the question "Waksman isolated" is both Actinomycin and Streptomycin.

7. **Final Answer**: The correct option is "both 1 and 2".

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