STRUCTURE AND PROPERTIES OF AMINO ACIDS QUIZ

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

Alanine

Asparagine

Valine

Proline

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Which of the following pairs of amino acids would carry a negative charge on their side chain at pH 8.0?

Histidine & Lysine

Leucine & Glycine

Aspartate & Glutamate

Asparagine & Glutamine

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Which of the following is a nonprotein amino acid?

Cystine

Hydroxylysine

Dopamine

None of these

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What is the heaviest of the twenty amino acids?

Tryptophan

Histidine

Phenylalanine

Tyrosine

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Which of the following is not an essential amino acid?

Glutamic acid

Glycine

Aspartic acid

All of these

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An essential amino acid is one that

is essentially easy to synthesize

is essential to flagella motion

the body cannot synthesize

the body can synthesize under essential conditions

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The sulphur containing side chain of cysteine is

hydrophobic, highly reactive and capable of reacting with another cysteine

hydrophillc, highly reactive and capable of reacting with another cysteine

None of these

ampiphillic, highly reactive and capable of reacting with another cysteine

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When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes

a zwitterions

an isotope

a cation

nonpolar

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The sequence of letters 'WYQN' will represent

Glutamine, tyrosine, tryptophan, aspartic acid

Tryptophan, glutamine, tryptophan, asparagine

Tryptophan, tyrosine, glutamine, asparagine

Tryptophan, tyrosine, glutamic acid, asparagine

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What is the product of the catabolic breakdown of Arginine?

Alpha-ketoglutarate

Succinate

Oxaloacetate

Fumarate

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