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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following is not an essential amino acid?

Aspartic acid
Glycine
Glutamic acid
All of these

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Structure and Properties of Amino Acids
Coomassie Blue stains the proteins by reacting with

arginine residues
free c-termini
peptide bonds
aromatic ring

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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
Threonine & Histidine
Phenylalnine & Proline
Cystein & Asparagine

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

All of these
Tryptophan
Lysine
Methionine

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

Histidine
Hydroxyproline
Isoleucine
Cysteine

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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 __________ .

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

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