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JEE Advanced levelSingle correct optionDifficulty 3 of 3bm077

The total number of stereocentres present in one molecule each of L-threonine, L-isoleucine, L-cysteine and glycine taken together is

  1. A5
  2. B3
  3. C4
  4. D6

Answer: A

Threonine has 2 stereocentres (C2 and C3), isoleucine has 2 (C2 and C3), cysteine has 1 (alpha-carbon) and glycine has 0. Total = .
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