Which Statement About Cystine Is CORRECT

question 64

Multiple Choice

Which statement about cystine is CORRECT?

• A) Cystine forms when the -CH₂-SH R group is oxidized to form a -CH₂-S-S-CH₂- disulfide bridge between two cysteines.
• B) Cystine is an example of a nonstandard amino acid, derived by linking two standard amino acids.
• C) Cystine is formed by the oxidation of the carboxylic acid group on cysteine.
• D) Cystine is formed through a peptide linkage between two cysteines.
• E) Two cystines are released when a -CH₂-S-S-CH₂- disulfide bridge is reduced to -CH₂-SH.

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