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

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Structure and Properties of Peptides
Disulfide bonds most often stabilize the native structure of

hydrophobic proteins
dimeric proteins
extracellular proteins
intracellular proteins

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Structure and Properties of Peptides
What was the first protein whose complete tertiary structure was determined?

Lysozyme
Myoglobin
Pancreatic DNase
Pancreatic ribonuclease

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Structure and Properties of Peptides
The nature of peptide bond can be best explained as

truly double bond
Van der waals force
partial double bond
Hydrogen bond

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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?

C20H50O20N10
C20H40O10N10
C20H32O11N10
C20H68O29N10

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Structure and Properties of Peptides
The resonance structures that can be drawn for the peptide bond indicate that the peptide bond

is still not completely understood
both (a) and (b)
has partial double bond character
is stronger than an ordinary single bond

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