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

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

One-third
One-tenth
Half
One-fourth

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Structure and Properties of Peptides
Peptides in the fully extended chain conformation

have Y = F = 180°
are equivalent to the (3-sheet structure
do not occur in nature
also have a cis geometry in their peptide bonds

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Structure and Properties of Peptides
Which of the three subunits of the G proteins binds GDP and GTP?

Beta
Delta
Alpha
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 multimeric protein
A P-pleated sheet

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

Gamma
Delta
Epsilon
Alfa

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