Sir Alexander Fleming got Nobel Prix for
**Core Concept**
Sir Alexander Fleming is credited with the discovery of penicillin, a naturally occurring antibiotic produced by the fungus Penicillium notatum. This discovery revolutionized the treatment of bacterial infections and earned him the Nobel Prize in Physiology or Medicine in 1945.
**Why the Correct Answer is Right**
Fleming's discovery of penicillin led to the isolation and purification of the antibiotic, which was then used to treat a variety of bacterial infections. The mechanism of action of penicillin involves the inhibition of bacterial cell wall synthesis, ultimately leading to cell lysis and death. Fleming's work paved the way for the development of modern antibiotics and saved countless lives.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Fleming's discovery of penicillin was not related to the development of vaccines.
* **Option B:** This option is incorrect because Fleming did not receive the Nobel Prize for his work on cancer research.
* **Option C:** This option is incorrect because Fleming's discovery of penicillin was not related to the development of insulin.
**Clinical Pearl / High-Yield Fact**
Fleming's discovery of penicillin is often attributed to a chance observation, but it was actually the result of careful observation and experimentation. This highlights the importance of careful observation and attention to detail in scientific research.
**Correct Answer:** C.