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Total Questions : 173 | Page
17
of 18 pages
Question 161.
. 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
See Solution
Discuss Question
Answer: Option A. ->
reactive hydroxyl group in the side chain
Question 162.
. 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
See Solution
Discuss Question
Answer: Option C. ->
hydrophobic, highly reactive and capable of reacting with another cysteine
Question 163.
. Which of the following is a nonprotein amino acid?
Dopamine
Hydroxylysine
Cystine
None of these
See Solution
Discuss Question
Answer: Option A. ->
Dopamine
Question 164.
. Which of the following is not the hydrophobic and aromatic amino acid?
Phenylalanine
Tyrosine
Tryptophan
None of these
See Solution
Discuss Question
Answer: Option D. ->
None of these
Question 165.
. Coomassie Blue stains the proteins by reacting with
arginine residues
free c-termini
peptide bonds
aromatic ring
See Solution
Discuss Question
Answer: Option A. ->
arginine residues
Question 166.
. Which amino acid when exposed to ninhydrin produces a brown color?
Asparagine
Proline
Alanine
Valine
See Solution
Discuss Question
Answer: Option A. ->
Asparagine
Question 167.
. The α-amino acids have a carboxyl group with a pK around __________ , and an amino group with a pK near __________ .
1.1, and 12.1
6.5, and 8.0
3.3, and 10.5
2.2, and 9.4
See Solution
Discuss Question
Answer: Option D. ->
2.2, and 9.4
Question 168.
. Stereo chemical configuration of all a-amino acids derived from proteins is
L
D
L and D
None of these
See Solution
Discuss Question
Answer: Option A. ->
L
Question 169.
. Which of the following is not the hydrophobic and aromatic amino acid?
Phenylalanine
Tyrosine
Tryptophan
None of these
See Solution
Discuss Question
Answer: Option D. ->
None of these
Question 170.
. Stereo chemical configuration of all a-amino acids derived from proteins is
L
D
L and D
None of these
See Solution
Discuss Question
Answer: Option A. ->
L
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