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?

C20H68O29N10
C20H50O20N10
C20H32O11N10
C20H40O10N10

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Structure and Properties of Peptides
Hemoglobin has quaternary structure and is made up of

two polypeptide chains, one α-chains and one β-chains
six polypeptide chains, two α-chains and four β-chains
four polypeptide chains, two α-chains and two β-chains
five polypeptide chains, two α-chains and three β-chains

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