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Structure and Properties of Peptides

Structure and Properties of Peptides
Which hemoglobin chain replaces the beta chain in embryonic hemoglobulin?

Delta
Epsilon
Gamma
Alfa

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

0.1
0.9
0.5
1.7

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Structure and Properties of Peptides
The peptide bond in proteins is

only found between proline residues
usually cis unless proline is the next amino acid
usually trans unless proline is the next amino acid
is planar because of steric hinderance

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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?

C20H68O29N10
C20H40O10N10
C20H32O11N10
C20H50O20N10

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Structure and Properties of Peptides
The oxygen in hemoglobin and myoglobin is bound to

histidine residues in the protein
lysine residues in the protein
the nitrogen atoms on the heme
the iron atom in the heme group

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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

peptide bonds
hydrogen bonds
phospho-diester bonds
disulfide bridges

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