An amino acid in which the R-group is hydrogen is
Correct answer: A. Glycine
- A. Glycine
- B. Alanine
- C. Leucine
- D. Valine
Explanation
The correct answer is glycine. Glycine is unique among amino acids because its side chain, or R-group, is just a single hydrogen atom. This simplicity gives glycine unique properties compared to other amino acids. In contrast, alanine has a methyl group (CH₃), leucine has an isobutyl group, and valine has an isopropyl group as its R-groups, all of which are more complex than a single hydrogen atom.
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