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Q: Following amino acid does not exhibit optical isomerism-
  • A. Alanine
  • B. Leucine
  • C. Serine
  • D. Glycine
Correct Answer: Option D - As like other amino acids glycine has two functional groups, carboxyl group (-COOH) and an amine group (NH₂). Glycine does not exhibit optical isomerism because it lacks a chiral center. It has simplest side chain of all the amino acids, composed of a single hydrogen atom (-H).
D. As like other amino acids glycine has two functional groups, carboxyl group (-COOH) and an amine group (NH₂). Glycine does not exhibit optical isomerism because it lacks a chiral center. It has simplest side chain of all the amino acids, composed of a single hydrogen atom (-H).

Explanations:

As like other amino acids glycine has two functional groups, carboxyl group (-COOH) and an amine group (NH₂). Glycine does not exhibit optical isomerism because it lacks a chiral center. It has simplest side chain of all the amino acids, composed of a single hydrogen atom (-H).