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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
In a polypeptide average mass of an amino acid residue is

118 daltons
80 daltons
150 daltons
110 daltons

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Structure and Properties of Amino Acids
Proteins and macromolecular structures take on their higher order structures

All of these
with the help of precursor sequences that are removed from the final structures
by self-assembly
with the help of molecular chaperons

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Structure and Properties of Amino Acids
Which of the following amino acid is known as half-cystine residue?

Valine
Isoleucine
Histidine
Cysteine

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Structure and Properties of Amino Acids
Which of the following amino acid contain an imidazolium moiety?

Cysteine
Alanine
Valine
Histidine

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Structure and Properties of Amino Acids
Which of the following is a nonprotein amino acid?

Cystine
None of these
Dopamine
Hydroxylysine

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Structure and Properties of Amino Acids
When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes

a cation
a zwitterions
an isotope
nonpolar

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