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Structure and Properties of Amino Acids

Structure and Properties of Amino Acids
Which of the following amino acids can form hydrogen bonds with their side (R) groups?

All of these
Asparagine
Glutamine
Aspartic acid

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Structure and Properties of Amino Acids
Which of the following amino acid contain an imidazolium moiety?

Cysteine
Histidine
Alanine
Valine

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

L and D
None of these
L
D

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

peptide bonds
aromatic ring
free c-termini
arginine residues

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Structure and Properties of Amino Acids
Which of the following is not the hydrophobic and aromatic amino acid?

Tryptophan
Tyrosine
None of these
Phenylalanine

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