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Structure and Properties of Peptides

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

Epsilon
Alfa
Delta
Gamma

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Structure and Properties of Peptides
What is the proportion of glycine residues in collagenous regions?

One-fourth
One-third
One-tenth
Half

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Structure and Properties of Peptides
Which of the following is an example of tertiary structure in a protein?

A globular domain
A P-pleated sheet
A multimeric protein
An a-helix

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Structure and Properties of Peptides
Hydrogen bonds in a-helices are

more numerous than Vander Waals interactions
analogous to the steps in a spiral staircase
not present at Phe residues
roughly parallel to the helix axis

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

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

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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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