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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
What is the heaviest of the twenty amino acids?

Tyrosine
Tryptophan
Histidine
Phenylalanine

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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 __________ .

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

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Structure and Properties of Amino Acids
Stereo chemical configuration of all a-amino acids derived from proteins is

D
None of these
L
L and D

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Structure and Properties of Amino Acids
Amino acids required in the human diet and not synthesized by the body are called

trace
accessory
essential
specialized

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

ion conversion
ambions
amphions
zwitterions

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

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

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