问题
选择题
多肽链中主链骨架的组成是 [ ]
A．－CNHOCNHOCNHO－
B．-NCCNNCCNNCCH－
C．－CHNOCHNOCHNO－
D．－CONHCCONHCCONH－
E．－CNOHCNOHCNOH－
答案
答案：D
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多肽链中主链骨架的组成是 [ ]
A．－CNHOCNHOCNHO－
B．-NCCNNCCNNCCH－
C．－CHNOCHNOCHNO－
D．－CONHCCONHCCONH－
E．－CNOHCNOHCNOH－
答案：D