Which peptide bond is most likely to exist in a cis conformation?
Pro-Gly is the scientifically accurate answer to this question. Within the study of Peptide and Ramachandran plo, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Pro-Gly directly address what is being asked. Among the other options, Ala-Ala, Val-Leu, and Ser-Thr do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.