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BCH 200David Umahi Federal University of Health SciencesOct 25, 2026

peptides Bch

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Executive Topic Summary

High-yield cheatsheet and core concepts for BCH 200.

High-Yield Exam Takeaways

  • Peptide Fundamentals
  • Classification by Size
  • Nomenclature Rules
  • Peptide Bond Properties
  • Quantitative Relationships
  • Key Peptide Examples
  • Structural Classification
  • Medical Applications
  • Functional Categories

Sample Practice Questions (Active Recall)

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Q1.Which of the following best explains why amino acid units in a finished peptide are termed "residues" rather than simply "amino acids"?

AThey are chemically inert and do not participate in further reactions
BElements of water have been removed during peptide bond formation
CThey undergo phosphorylation during peptide bond formation
DThey retain their original molecular mass after condensation

Q2.What is the consequence of the condensation reaction mechanism on the atoms involved in peptide bond formation?

AThe alpha-carbon of each amino acid becomes directly bonded
BThe amino nitrogen gains an additional hydrogen atom
CThe carbonyl carbon loses its oxygen atom completely
DThe carboxyl group loses —OH and the amino group loses —H, releasing H₂O

Q3.How does the directionality of peptide chain synthesis relate to the functional groups present at each terminus?

ABoth termini contain free amino groups in linear peptides
BThe N-terminus contains a free amino group and the C-terminus contains a free carboxyl group
CThe N-terminus contains a free carboxyl group and synthesis proceeds toward the amino end
DThe C-terminus is defined by a free amino group and synthesis proceeds backward

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