Structure and Properties of Peptides
The molecular formula for glycine is C2H5O2N. What would be the molecular formula for a linear oligomer made by linking ten glycine molecules together by condensation synthesis?

C20H32O11N10
C20H40O10N10
C20H68O29N10
C20H50O20N10

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Structure and Properties of Peptides
Secondary structure in protein refers to

protein made up of more than one polypeptide chain
regular folding of regions of the polypeptide chain
linear sequence of amino acids joined together by peptide bond
three dimensional arrangement of all amino acids in polypeptide chain

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Structure and Properties of Peptides
In deoxy hemoglobin (Hb), the Fe (II) is coordinated to

four nitrogens of heme and to a water molecule
two nitrogens of heme and to three water molecules
four nitrogens of heme, the proximal His, and a water molecule
two nitrogens of heme and to three His residues in Hb

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