Exercise: Structure And Properties Of Amino Acids

Questions for: Structure And Properties Of Amino Acids

Which amino acid when exposed to ninhydrin produces a brown color?
A:
Asparagine
B:
Proline
C:
Alanine
D:
Valine
Answer: A
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Coomassie Blue stains the proteins by reacting with
A:
arginine residues
B:
free c-termini
C:
peptide bonds
D:
aromatic ring
Answer: A
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The α-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ .
A:
1.1, and 12.1
B:
6.5, and 8.0
C:
3.3, and 10.5
D:
2.2, and 9.4
Answer: D
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Stereo chemical configuration of all a-amino acids derived from proteins is
A:
L
B:
D
C:
L and D
D:
None of these
Answer: A
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Which of the following is not the hydrophobic and aromatic amino acid?
A:
Phenylalanine
B:
Tyrosine
C:
Tryptophan
D:
None of these
Answer: D
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