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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
What is the proportion of glycine residues in collagenous regions?

One-tenth
Half
One-fourth
One-third

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

1.7
0.9
0.5
0.1

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Structure and Properties of Peptides
In the β-pleated sheet

All of these
hydrogen bonds are formed between the peptide bonds
the polypeptide chain is fully extended
adjacent polypeptide chains can either be parallel or antiparallel

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

Delta
Epsilon
Alfa
Gamma

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

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