C. In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present. Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died. 1. Identify the problem. 2. What was Fleming's hypothesis? 3. How was the hypothesis tested? 4. Should the hypothesis be supported or rejected based on the experiment? 5. This experiment lead to the development of what major medical advancement?

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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C. In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture
dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear
area existed around the mold because all the bacteria that had grown in this area had died. In the
culture dishes without the mold, no clear areas were present. Fleming hypothesized that the mold
must be producing a chemical that killed the bacteria. He decided to isolate this substance and test
it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This
solution contained all the materials the mold needed to grow. After the mold grew, he removed it
from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a
culture of bacteria. He observed that the bacteria died.
1. Identify the problem.
2. What was Fleming's hypothesis?
3. How was the hypothesis tested?
4. Should the hypothesis be supported or rejected based on the experiment?
5. This experiment lead to the development of what major medical advancement?
Transcribed Image Text:C. In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present. Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died. 1. Identify the problem. 2. What was Fleming's hypothesis? 3. How was the hypothesis tested? 4. Should the hypothesis be supported or rejected based on the experiment? 5. This experiment lead to the development of what major medical advancement?
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