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

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

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

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Structure and Properties of Peptides
The same peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala. was digested with chymotrypsin 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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Structure and Properties of Peptides
The nature of peptide bond can be best explained as

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

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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 quaternary structure
Complete tertiary structure
Complete secondary structure
Thermodynamic stability

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

Epsilon
Delta
Gamma
Alfa

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