26. The sulphur containing side chain of cysteine is
A. ampiphillic, highly reactive and capable of reacting with another cysteine
B. hydrophillc, highly reactive and capable of reacting with another cysteine
C. hydrophobic, highly reactive and capable of reacting with another cysteine
D. none of the above
27. Which of the following is a nonprotein amino acid?
A. Dopamine
B. Hydroxylysine
C. Cystine
D. None of these
28. Serine and threonine are polar amino acids due to
A. reactive hydroxyl group in the side chain
B. reactive alcoholic group in the side chain
C. reactive keto group in the side chain
D. reactive aldehyde group in the side chain
29. Which of the following is not the hydrophobic and aromatic amino acid?
A. Phenylalanine
B. Tyrosine
C. Tryptophan
D. None of these
30. Stereo chemical configuration of all a-amino acids derived from proteins is
A. L
B. D
C. L and D
D. None of these
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