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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
All of these
the reverse turn
the P-strand

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

Alfa
Delta
Epsilon
Gamma

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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

hydrogen bonds
phospho-diester bonds
disulfide bridges
peptide bonds

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Structure and Properties of Peptides
In the β-pleated sheet

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

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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?

Thermodynamic stability
Complete tertiary structure
Complete quaternary structure
Complete secondary structure

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

One-tenth
One-third
Half
One-fourth

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