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Structure and Properties of Peptides

Structure and Properties of Peptides
Disulfide bonds most often stabilize the native structure of

hydrophobic proteins
intracellular proteins
dimeric proteins
extracellular proteins

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Structure and Properties of Peptides
What is the effect of a decrease in pH on hemoglobin oxygen affinity?

Increase in oxygen affinity
Decrease in oxygen affinity
No effect on oxygen affinity
Increase affinity in muscle cell otherwise decrease

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

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

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

Gamma
Delta
Alfa
Epsilon

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Structure and Properties of Peptides
The different orders of protein structure are determined by all of the following bond types except

peptide bonds
disulfide bridges
hydrogen bonds
phospho-diester bonds

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Structure and Properties of Peptides
In the β-pleated sheet

adjacent polypeptide chains can either be parallel or antiparallel
the polypeptide chain is fully extended
hydrogen bonds are formed between the peptide bonds
All of these

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