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JEE Main · 2023 · 25 Jan 2023 · Shift 1 · Chemistry in Everyday Life

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Which of the following statements is incorrect for antibiotics?
  1. (A)An antibiotic must be a product of metabolism.
  2. (B)An antibiotic is a synthetic substance produced as a structural analogue of naturally occurring antibiotic.
  3. (C)An antibiotic should promote the growth or survival of microorganisms.✓ Correct
  4. (D)An antibiotic should be effective in low concentrations.

Answer: (C)

Solution

An antibiotic is a substance produced wholly or partly by the metabolism of a micro-organism, or made as a structural analogue of such a product, that in low concentration inhibits the growth of or destroys other micro-organisms. Its defining action is the suppression of microbial life. A statement that an antibiotic should promote the growth or survival of micro-organisms therefore contradicts the definition and is the incorrect one.

JEE Main · 2023 · 25 Jan 2023 · Shift 1 · Single correct option

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