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Structure and Properties of Peptides

Structure and Properties of Peptides
An oil drop with a polar coat is a metaphor referring to the three dimensional structure of

fibrous proteins
collagen
silk protein
globular proteins

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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
C20H68O29N10
C20H32O11N10
C20H50O20N10

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

Delta
Alfa
Epsilon
Gamma

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

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

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

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

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

0.5
0.1
0.9
1.7

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