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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
Histidine & Lysine
Asparagine & Glutamine
Leucine & Glycine

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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

specialized
accessory
essential
trace

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

Valine
Alanine
Asparagine
Proline

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Structure and Properties of Amino Acids
Which amino acids would most likely reside in the membrane-anchoring domain of a membrane embedded protein?

Leucine, threonine, and lysine
Isoleucine, valine and phenylalanine
Phenylalanine, valine, and aspartate
Lysine, arginine and histidine

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Structure and Properties of Amino Acids
Serine and threonine are polar amino acids due to

reactive alcoholic group in the side chain
reactive keto group in the side chain
reactive aldehyde group in the side chain
reactive hydroxyl group in the side chain

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

None of these
D
L
L and D

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