Which of the following orders were newly introduced in APG IV (2016)?

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#Question id: 154

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The peptide bond is which of the following?

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#Question id: 155

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Which amino acids are linked in phenylalanylglycine?

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#Question id: 156

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What is the N-terminal for the pentapeptide Val-Ile-Glu-Arg-Tyr?

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#Question id: 158

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At the isoelectric pH of a tetrapeptide:

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#Question id: 159

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The chirality of an amino acid results from the fact that its alpha carbon:

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#Question id: 160

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Of the 20 standard amino acids, only ___________ is not optically active.  The reason is that its side chain ___________.