Which amino acid when exposed to ninhydrin produces a brown color?
Asparagine
Proline
Alanine
Valine
Correct answer is A
No explanation has been provided for this answer.
Coomassie Blue stains the proteins by reacting with
arginine residues
free c-termini
peptide bonds
aromatic ring
Correct answer is A
No explanation has been provided for this answer.
Stereo chemical configuration of all a-amino acids derived from proteins is
L
D
L and D
None of these
Correct answer is A
No explanation has been provided for this answer.
Which of the following is not the hydrophobic and aromatic amino acid?
Phenylalanine
Tyrosine
Tryptophan
None of these
Correct answer is D
No explanation has been provided for this answer.
Serine and threonine are polar amino acids due to
reactive hydroxyl group in the side chain
reactive alcoholic group in the side chain
reactive keto group in the side chain
reactive aldehyde group in the side chain
Correct answer is A
No explanation has been provided for this answer.
Which of the following is a non-protein amino acid?
Dopamine
Hydroxylysine
Cystine
None of these
Correct answer is A
No explanation has been provided for this answer.
The sulphur containing side chain of cysteine is
ampiphillic, highly reactive and capable of reacting with another cysteine
hydrophillc, highly reactive and capable of reacting with another cysteine
hydrophobic, highly reactive and capable of reacting with another cysteine
none of the above
Correct answer is C
No explanation has been provided for this answer.
The sequence of letters 'WYQN' will represent
Tryptophan, tyrosine, glutamic acid, asparagine
Tryptophan, tyrosine, glutamine, asparagine
Tryptophan, glutamine, tryptophan, asparagine
Glutamine, tyrosine, tryptophan, aspartic acid
Correct answer is B
No explanation has been provided for this answer.
Which of the following amino acid contain an imidazolium moiety?
Alanine
Valine
Cysteine
Histidine
Correct answer is D
No explanation has been provided for this answer.
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