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Structure and Properties of Peptides

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

Delta
Beta
Gamma
Alpha

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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
Peptides in the fully extended chain conformation

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

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

Epsilon
Alfa
Delta
Gamma

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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 was the first protein whose complete tertiary structure was determined?

Lysozyme
Pancreatic ribonuclease
Pancreatic DNase
Myoglobin

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