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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following amino acids can form hydrogen bonds with their side (R) groups?

Aspartic acid
All of these
Asparagine
Glutamine

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Structure and Properties of Amino Acids
The isoelectric point of an amino acid is defined as the pH

of maximum electrolytic mobility
where the molecule carries no electric charge
where the carboxyl group is uncharged
where the amino group is uncharged

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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?

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

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Structure and Properties of Amino Acids
Which pair of amino acids absorbs the most UV light at 280 nm?

Cystein & Asparagine
Threonine & Histidine
Phenylalnine & Proline
Trp & Tyrosine

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Structure and Properties of Amino Acids
Which of the following is not an essential amino acid?

Glutamic acid
All of these
Aspartic acid
Glycine

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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
an isotope
nonpolar
a zwitterions

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