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Sir Alexander Flemming extracted penicil...

Sir Alexander Flemming extracted penicillium from

A

Penicillium citrinum

B

Penicillium naatum

C

Pencicillium chrysogenum

D

Bacillus brevis

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Context**: Sir Alexander Fleming is known for his discovery of penicillin, which is an antibiotic. This discovery was made while he was studying bacteria. 2. **Identifying the Experiment**: Fleming was working with Staphylococcus bacteria, which he was growing on petri dishes. During his experiments, he observed something unusual. 3. **Observation of Mold Growth**: Fleming noticed that there was mold growing on one of the plates where he had cultured the Staphylococcus bacteria. 4. **Effect of the Mold**: He observed that the presence of this mold inhibited the growth of the Staphylococcus bacteria. This indicated that the mold was producing a substance that had antibacterial properties. 5. **Identifying the Mold**: The mold that Fleming identified was of the species *Penicillium notatum*. He found that this mold was secreting a substance that he named penicillin. 6. **Conclusion**: Therefore, the correct answer to the question "Sir Alexander Fleming extracted penicillium from" is *Penicillium notatum*. **Final Answer**: *Penicillium notatum* ---
**Step-by-Step Solution:** 1. **Understanding the Context**: Sir Alexander Fleming is known for his discovery of penicillin, which is an antibiotic. This discovery was made while he was studying bacteria. 2. **Identifying the Experiment**: Fleming was working with Staphylococcus bacteria, which he was growing on petri dishes. During his experiments, he observed something unusual. 3. **Observation of Mold Growth**: Fleming noticed that there was mold growing on one of the plates where he had cultured the Staphylococcus bacteria. ...
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