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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
The peptide bond in proteins is

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

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

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

Alfa
Gamma
Epsilon
Delta

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Structure and Properties of Peptides
The major element of secondary structure in myoglobin and hemoglobin is

the P-strand
All of these
the a-helix
the reverse turn

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Structure and Properties of Peptides
In β-pleated sheet structures neighbouring

neighboring chains are connected by a-helices
chains lie in a flat plane
neighboring residues are hydrogen bonded
neighboring chains are hydrogen bonded

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