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JEE Main · 2021 · 27 Jul 2021 · Shift 2 · Chemistry in Everyday Life

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Given below are two statements :
Statement I: Penicillin is a bacteriostatic type antibiotic.
Statement II: The general structure of penicillin is:
  1. (A)Both statement I and statement II are true
  2. (B)Statement I is correct but statement II is false
  3. (C)Statement I is incorrect but statement II is true✓ Correct
  4. (D)Both statement I and statement II are false

Answer: (C)

Solution

Penicillin blocks the enzyme that cross-links the growing bacterial cell wall, so the organism bursts instead of merely pausing its growth, which makes penicillin bactericidal rather than bacteriostatic. The formula drawn is the accepted general structure of the penicillins: a four-membered -lactam ring fused to a five-membered thiazolidine ring that carries the gem-dimethyl group and the carboxyl group, with a variable acyl amino side chain on the -lactam. Statement I is false and Statement II is true.

JEE Main · 2021 · 27 Jul 2021 · Shift 2 · Single correct option

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