Question:
Identify a side chain (R) group present in Leucine, an amino acid.
Identify a side chain (R) group present in Leucine, an amino acid.
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Leucine and Isoleucine are isomers; Leucine has an isobutyl group, while Isoleucine has a sec-butyl group.
Updated On: Apr 30, 2026
- H$-$
- $-$CH$_3$
- Me$_2$CH$-$
- Me$_2$CH $-$ CH$_2-$
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Concept
Amino acids differ based on their side chain ($R$ group) attached to the alpha-carbon.
Step 2: Analysis
- (A) $H-$ is Glycine. - (B) $-CH_3$ is Alanine. - (C) $Me_2CH-$ (isopryl) is Valine. - (D) $Me_2CH-CH_2-$ (isobutyl) is Leucine.
Step 3: Conclusion
The side chain for Leucine is the isobutyl group.
Final Answer: (D)
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