The S-Trans Conformation of a Peptide Bond Is More Stable

question 47

Multiple Choice

The s-trans conformation of a peptide bond is more stable than the s-cis conformation because:

• A) there is a restricted rotation around the peptide bond
• B) rotation is allowed around the peptide bond
• C) it has reduced steric hindrance
• D) none of these

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Definitions:

RU-486

A synthetic steroid used medically to induce abortion by blocking the action of progesterone.

Cis-trans Isomers

Stereoisomers that differ in the spatial arrangement of groups relative to a double bond, ring, or other structure leading to different physical and chemical properties.

Constitutional Isomers

Molecules that share the same molecular formula but differ in the connectivity of their atoms, leading to different structural forms.

Isomeric

Describes molecules that have the same molecular formula but different arrangements of atoms, resulting in different properties.