Which among the bonds indicated here in a polypeptide structure is rotation impossible? (kindly show explanation or illustration. thank you!) Choices: A. 2 B. information is not enough to answer the question C. 3 D. 1

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Q: this be done in bond line

A: No.

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Q: Select the sentence that correctly describes the relationship between this pair of molecules. a…

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Q: this structural formula represent: -COH

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Q: In a portion of polypeptide shown below, which bond is described by g rotation? a b NH,--- ---CO

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