Question:
Alexander Fleming was the first person to discover 'Penicillin' by chance. He worked on which bacterium?
Alexander Fleming was the first person to discover 'Penicillin' by chance. He worked on which bacterium?
Updated On: Aug 1, 2023
- Haemophilus Influenza
- Staphylococci
- Streptococcus Pneumoniae
- Salmonella Typhi
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The Correct Option is B
Solution and Explanation
The correct answer is option (B): Staphylococci
While working with Staphylococcus aureus, Fleming noticed that there was a contamination of fungus. The mold that was later known as Penicillium notatum stopped the growth of the bacteria. Penicillium works by inhibiting the production of peptidoglycan that is used in the cell wall. Earlier Fleming thought it was an enzyme but later discovered that it is an antibiotic.
While working with Staphylococcus aureus, Fleming noticed that there was a contamination of fungus. The mold that was later known as Penicillium notatum stopped the growth of the bacteria. Penicillium works by inhibiting the production of peptidoglycan that is used in the cell wall. Earlier Fleming thought it was an enzyme but later discovered that it is an antibiotic.
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Concepts Used:
Microbes in Human Welfare
There are several valuable microorganisms that are beneficial to humans in various manners such as:
In Household Products
- Fermentation of milk to produce yogurt.
- Milk cuddling to compose curd, cheese, and paneer.
In Industrial Products
- Production of beverages such as wine, beer, whiskey, brandy, or rum.
- Production of antibiotics such as Penicillin and other chemical substances to kill or retard the expansion of disease-causing microbes.
Fermented Beverages
- A fermentor is used to produce microbes on a large scale for industrial purposes.
- The brewer’s yeast (Saccharomyces cerevisiae) is used to make ethanol. At this time, the yeast ferments malted cereals and fruit juices.
Antibiotics
- The term antibiotic means “against life”. These materials can kill or destroy the growth of other microbes.