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Structure and Properties of Peptides

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

Epsilon
Delta
Gamma
Alfa

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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
The heme is held in place by a bond between

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

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Structure and Properties of Peptides
The peptide bond in proteins is

only found between proline residues
usually trans unless proline is the next amino acid
is planar because of steric hinderance
usually cis unless proline is the next amino acid

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

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

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

Lysozyme
Myoglobin
Pancreatic ribonuclease
Pancreatic DNase

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