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MCQs

Total Questions : 33 | Page 2 of 4 pages
Question 11. Which of the following is an essential amino acid?
  1.    All of these
  2.    Tryptophan
  3.    Methionine
  4.    Lysine
 Discuss Question
Answer: Option A. -> All of these
Question 12. In a polypeptide average mass of an amino acid residue is
  1.    150 daltons
  2.    80 daltons
  3.    110 daltons
  4.    118 daltons
 Discuss Question
Answer: Option C. -> 110 daltons
Question 13. Which pair of amino acids absorbs the most UV light at 280 nm?
  1.    Phenylalnine & Proline
  2.    Cystein & Asparagine
  3.    Trp & Tyrosine
  4.    Threonine & Histidine
 Discuss Question
Answer: Option C. -> Trp & Tyrosine
Question 14. Which of the following is a nonstandard amino acid?
  1.    Hydroxyproline
  2.    Cysteine
  3.    Isoleucine
  4.    Histidine
 Discuss Question
Answer: Option A. -> Hydroxyproline
Question 15. Which of the following pairs of amino acids would carry a negative charge on their side chain at pH 8.0?
  1.    Asparagine & Glutamine
  2.    Histidine & Lysine
  3.    Leucine & Glycine
  4.    Aspartate & Glutamate
 Discuss Question
Answer: Option D. -> Aspartate & Glutamate
Question 16. Which of the following amino acid is known as half-cystine residue?
  1.    Isoleucine
  2.    Valine
  3.    Histidine
  4.    Cysteine
 Discuss Question
Answer: Option D. -> Cysteine
Question 17. Which of the following is not a sensible grouping of amino acids based on their polarity properties?
  1.    Phe, Trp, and Tyr
  2.    Arg, His, and Lys
  3.    Asp, Ile, and Pro
  4.    Ala, Leu, and Val
 Discuss Question
Answer: Option C. -> Asp, Ile, and Pro
Question 18. Protein fluorescence arises primarily from which residue?
  1.    Phenylalanine
  2.    Arginine
  3.    Tryptophan
  4.    Tyrosine
 Discuss Question
Answer: Option C. -> Tryptophan
Question 19. Which of the following is not an essential amino acid?
  1.    All of these
  2.    Glycine
  3.    Glutamic acid
  4.    Aspartic acid
 Discuss Question
Answer: Option A. -> All of these
Question 20. Proteins and macromolecular structures take on their higher order structures
  1.    with the help of precursor sequences that are removed from the final structures
  2.    All of these
  3.    by self-assembly
  4.    with the help of molecular chaperons
 Discuss Question
Answer: Option B. -> All of these

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