試題詳解

77. Which of the following statements for the structure of proteins are CORRECT? ① A bond between amino acids is peptide bond. ② Disulfide bonds in proteins are formed by serine. ③ The amino acid sequence is the primary structure of proteins. ④ The coil-coiled motif is the tertiary structure of proteins. ⑤ The quaternary structure of proteins contains two or more polypeptide chains.
(A) ①,③,⑤
(B) ②,③,④
(C) ②,③,⑤
(D) ①,③,④
(E) ①,②,③