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Structure and Properties of Peptides

Structure and Properties of Peptides
Which of the following is an example of tertiary structure in a protein?

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

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

Myoglobin
Pancreatic DNase
Lysozyme
Pancreatic ribonuclease

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Structure and Properties of Peptides
The oxygen binding curves of hemoglobin and myoglobin

allow maximum transfer of oxygen to the tissues
are identical
both (a) and (b)
are a consequence of the quaternary structure of hemoglobin

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

1.7
0.5
0.9
0.1

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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
The peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala, was digested with cyanogen bromide (CNBr) to produce:

Val-Lys-Glu + Met-Ser-Trp-Arg-Ala
Val-Lys + Glu-Met-Ser + Trp-Arg-Ala
Val-Lys-Glu-Met + Ser-Trp-Arg-Ala
Val-Lys-Glu-Met-Ser-Trp + Arg-Ala

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