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Structure and Properties of Peptides

Structure and Properties of Peptides
The major element of secondary structure in myoglobin and hemoglobin is

the a-helix
the reverse turn
All of these
the P-strand

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Structure and Properties of Peptides
The different orders of protein structure are determined by all of the following bond types except

phospho-diester bonds
disulfide bridges
peptide bonds
hydrogen bonds

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Structure and Properties of Peptides
If the F and Y angles of each peptide unit in a protein are known, which of the following may also be determined?

Complete quaternary structure
Complete secondary structure
Complete tertiary structure
Thermodynamic stability

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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?

C20H40O10N10
C20H50O20N10
C20H32O11N10
C20H68O29N10

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Structure and Properties of Peptides
When pO2 = Kd of myoglobin, the fractional saturation (YO2) is about

1.7
0.5
0.9
0.1

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Structure and Properties of Peptides
The oxygen binding curves of hemoglobin and myoglobin

are identical
allow maximum transfer of oxygen to the tissues
both (a) and (b)
are a consequence of the quaternary structure of hemoglobin

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