MCQ
Who discovered the first antibiotic?
- AA. Fleming
- BW. Flemming
- CS. Waksman
- DLouis Pasteur
Explanation:
Antibiotics are chemical substances produced by the microorganisms that can kill or inhibit the growth of other bacteria and fungi. Alexander Fleming discovered penicillin, the first antibiotic in 1928, made from the Penicillium notatum.
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Reason : Stickiness of the ends facilitates the action of the enzyme $DNA$ polymerase
| List $I$ (Interacting species) | List $II$ (Name of interaction) |
| $A$. A Leopard and a Lion in a forest/grassland | $I$. Competition |
| $B$. A Cuckoo laying egg in a Crow's nest | $II$. Brood parasitism |
| $C$. Fungi and root of a higher plant in Mycorrhizae | $III$. Mutualism |
| $D$. A cattle egret and a Cattle in a field | $IV$. Commensalism |
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