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Structure and Properties of Amino Acids

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

Alanine
Histidine
Cysteine
Valine

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Structure and Properties of Amino Acids
Which amino acid when exposed to ninhydrin produces a brown color?

Alanine
Proline
Valine
Asparagine

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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?

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

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Structure and Properties of Amino Acids
Molecules that bear charged groups of opposite polarity are known as

ambions
zwitterions
amphions
ion conversion

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

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

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Structure and Properties of Amino Acids
The α-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ .

6.5, and 8.0
3.3, and 10.5
1.1, and 12.1
2.2, and 9.4

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