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Structure and Properties of Amino Acids

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

nonpolar
a cation
a zwitterions
an isotope

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Structure and Properties of Amino Acids
Protein fluorescence arises primarily from which residue?

Tyrosine
Arginine
Phenylalanine
Tryptophan

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Structure and Properties of Amino Acids
An essential amino acid is one that

is essential to flagella motion
the body cannot synthesize
is essentially easy to synthesize
the body can synthesize under essential conditions

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Structure and Properties of Amino Acids
Which of the following is a nonprotein amino acid?

Dopamine
Hydroxylysine
Cystine
None of these

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

Phenylalanine
Tryptophan
Histidine
Tyrosine

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Structure and Properties of Amino Acids
Which of the following is an essential amino acid?

All of these
Lysine
Tryptophan
Methionine

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