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| Q. |
An antibiotic is - |
| A. | achemical synthesized by a human cell against a microorganism |
| B. | a chemical synthesised by amicro-organism against another micro-organisms |
| C. | a substance produced by blood cells against bacteria |
| D. | a substance produced by blood cells against infection. |
| Answer» B. a chemical synthesised by amicro-organism against another micro-organisms | |
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Explanation: An antibacterial is an agent that inhibits bacterial growth or kills bacteria. Theterm is often used synonymously with the term antibiotic(s); today. The term antibiotic was first used in 1942 by Selman Waksman and his collaborators in journal articles to describe any substance produced by a microorganism that is antagonistic to the growth of other microorganisms in high dilution. |
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