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Structure and Properties of Amino Acids

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
Which amino acid when exposed to ninhydrin produces a brown color?

Valine
Alanine
Proline
Asparagine

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

All of these
Aspartic acid
Glutamine
Asparagine

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

Valine
Histidine
Cysteine
Alanine

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

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

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Structure and Properties of Amino Acids
How many different amino acids are there?

3
100
An infinite number
20

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