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MCQs

Total Questions : 33 | Page 1 of 4 pages
Question 1. What is the end product of leucine metabolism?
  1.    Acetyl carnitine
  2.    Pyruvic acid
  3.    Oxaloacetic acid
  4.    Acetyl-CoA
 Discuss Question
Answer: Option D. -> Acetyl-CoA
Question 2. When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes
  1.    an isotope
  2.    a cation
  3.    nonpolar
  4.    a zwitterions
 Discuss Question
Answer: Option D. -> a zwitterions
Question 3. The isoelectric point of an amino acid is defined as the pH
  1.    where the molecule carries no electric charge
  2.    of maximum electrolytic mobility
  3.    where the amino group is uncharged
  4.    where the carboxyl group is uncharged
 Discuss Question
Answer: Option A. -> where the molecule carries no electric charge
Question 4. Which of the following amino acids can form hydrogen bonds with their side (R) groups?
  1.    Aspartic acid
  2.    All of these
  3.    Asparagine
  4.    Glutamine
 Discuss Question
Answer: Option B. -> All of these
Question 5. What is the heaviest of the twenty amino acids?
  1.    Tryptophan
  2.    Histidine
  3.    Phenylalanine
  4.    Tyrosine
 Discuss Question
Answer: Option A. -> Tryptophan
Question 6. What is the product of the catabolic breakdown of Arginine?
  1.    Succinate
  2.    Alpha-ketoglutarate
  3.    Oxaloacetate
  4.    Fumarate
 Discuss Question
Answer: Option B. -> Alpha-ketoglutarate
Question 7. An essential amino acid is one that
  1.    the body cannot synthesize
  2.    is essential to flagella motion
  3.    is essentially easy to synthesize
  4.    the body can synthesize under essential conditions
 Discuss Question
Answer: Option A. -> the body cannot synthesize
Question 8. Which amino acids would most likely reside in the membrane-anchoring domain of a membrane embedded protein?
  1.    Lysine, arginine and histidine
  2.    Phenylalanine, valine, and aspartate
  3.    Leucine, threonine, and lysine
  4.    Isoleucine, valine and phenylalanine
 Discuss Question
Answer: Option D. -> Isoleucine, valine and phenylalanine
Question 9. D-Alanine and L-Alanine are technically known as
  1.    enantiomers
  2.    anomers
  3.    polymer
  4.    epimers
 Discuss Question
Answer: Option A. -> enantiomers
Question 10. Molecules that bear charged groups of opposite polarity are known as
  1.    ion conversion
  2.    ambions
  3.    zwitterions
  4.    amphions
 Discuss Question
Answer: Option C. -> zwitterions

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