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What Is a Peptide? Knowledge Check

Review lesson: What Is a Peptide?

1. What primarily distinguishes a peptide from a free amino acid?A peptide contains at least one peptide bondA peptide always contains sulfurA peptide must be cyclicA peptide has no carboxyl group

2. Which direction is conventionally used when writing peptide sequences?C-terminus to N-terminusN-terminus to C-terminusAlphabetical orderHighest-mass residue first

3. Why can two peptides with similar length behave differently?Sequence and side-chain properties affect structure and interactionsLength is the only relevant variableAll peptides of the same length are identicalOnly color determines behavior

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