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Structure and Properties of Peptides

Structure and Properties of Peptides
The heme is held in place by a bond between

the Fe2+ and cysteine
the Fe2+ and histidine
the Fe3+ and cysteine
the Fe3+ and histidine

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Structure and Properties of Peptides
The oxygen in hemoglobin and myoglobin is bound to

lysine residues in the protein
histidine residues in the protein
the iron atom in the heme group
the nitrogen atoms on the heme

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

Beta
Alpha
Delta
Gamma

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

One-third
Half
One-tenth
One-fourth

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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?

Complete tertiary structure
Complete quaternary structure
Thermodynamic stability
Complete secondary structure

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