Question
Biology Question on Microbes in human welfare
Alexander Fleming was the first person to discover 'Penicillin' by chance. He worked on which bacterium?
A
Haemophilus Influenza
B
Staphylococci
C
Streptococcus Pneumoniae
D
Salmonella Typhi
Answer
Staphylococci
Explanation
Solution
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.