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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following pairs of amino acids would carry a negative charge on their side chain at pH 8.0?

Aspartate & Glutamate
Asparagine & Glutamine
Leucine & Glycine
Histidine & Lysine

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Structure and Properties of Amino Acids
Which of the following is not a sensible grouping of amino acids based on their polarity properties?

Asp, Ile, and Pro
Ala, Leu, and Val
Phe, Trp, and Tyr
Arg, His, and Lys

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Structure and Properties of Amino Acids
The sequence of letters 'WYQN' will represent

Tryptophan, glutamine, tryptophan, asparagine
Tryptophan, tyrosine, glutamic acid, asparagine
Glutamine, tyrosine, tryptophan, aspartic acid
Tryptophan, tyrosine, glutamine, asparagine

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

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

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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

nonpolar
an isotope
a zwitterions
a cation

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

118 daltons
80 daltons
110 daltons
150 daltons

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