Biochemistry
Test Bank (All 23 chapters complete, Questions and Answers
with complete solutions already ratedA+
1. Which group consists only of amino acids with basic side chains?
A. leucine and lysine
B. arginine and leucine
C. lysine and arginine
D. arginine and isoleucine
2. Which amino acids contain sulfur?
A. cysteine and lysine
B. cysteine and methionine
C. arginine and methionine
D. cysteine and isoleucine
3. Which amino acid takes on a negative charge when the R-group loses a proton?
A. Glutamic Acid
B. Histidine
C. Glutamine
D. Tyrosine
E. Glutamic Acid and Tyrosine
4. Which amino acid takes on a positive charge when the R-group gains a proton?
A. Glutamic Acid
B. Histidine
C. Glutamine
D. Tyrosine E. Glycine
,5. Given the R-groups in the peptide, ALA-GLN-ARG-SER-HIS, it would likely be:
A. Very water soluble
B. Somewhat water soluble
C. Not very water soluble
D. Not soluble at all
E. You cannot tell from the sequence
6. Which amino acid is often added to other molecules to increase their water solubility?
A. Ala
B. Asp
C. Gly
D. Pro E. Trp
7. Which amino acid has a polar, non-ionic R-group
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine
E. Tyrosine
8. Which amino acid has the least polar R-group H?
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine E. Tyrosine
9. Which amino acid would have the greatest negative charge at pH = 7.0?
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine E. Tyrosine
10. Which amino acid would likely be least water-soluble at pH 7.0
A. Histidine
,B. Isoleucine
C. Isoleucine or Tyrosine, you cannot tell
D. Serine
E. Tyrosine
11. Which of the following is not considered an uncommon amino acid?
A. thyroxine
B. Hydroxylysine
C. Hydroxyproline
D. Tryptophan
12. Which statement is true about the classification of amino acids
A. Alanine and valine are basic amino acids.
, B. Lysine and arginine are acidic amino acids.
C. Glutamic acid and asparagine are hydrophobic amino acids.
D. Tryptophan and phenylalanine are aromatic amino acids.
E. Methionine and cysteine are hydroxyl-containing amino acids.
13. Which amino acid has a basic R group?
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine
E. Tyrosine
14. Which of the following can be considered a unique characteristic of histidine?
A. Its side chain is attached to the alpha carbon
B. It has a basic side chain
C. It has a side chain that is chemically basic but has an acidic pKa
D. It is technically an “imino” acid
15. Which amino acids would migrate furthest toward the anode (positive electrode) during
electrophoresis?
A. Aspartic acid.
B. Arginine.
C. Tyrosine.
D. Histidine. E. Glutamine.
16. What is the charge on the tetrapeptide lys-lys-his-glu at pH 7?
A. 0
B. +1
C. +2
D. -1
17. The pKa values of the alpha carboxyl groups of common amino acids are around
A. pH 2
B. pH 5
Test Bank (All 23 chapters complete, Questions and Answers
with complete solutions already ratedA+
1. Which group consists only of amino acids with basic side chains?
A. leucine and lysine
B. arginine and leucine
C. lysine and arginine
D. arginine and isoleucine
2. Which amino acids contain sulfur?
A. cysteine and lysine
B. cysteine and methionine
C. arginine and methionine
D. cysteine and isoleucine
3. Which amino acid takes on a negative charge when the R-group loses a proton?
A. Glutamic Acid
B. Histidine
C. Glutamine
D. Tyrosine
E. Glutamic Acid and Tyrosine
4. Which amino acid takes on a positive charge when the R-group gains a proton?
A. Glutamic Acid
B. Histidine
C. Glutamine
D. Tyrosine E. Glycine
,5. Given the R-groups in the peptide, ALA-GLN-ARG-SER-HIS, it would likely be:
A. Very water soluble
B. Somewhat water soluble
C. Not very water soluble
D. Not soluble at all
E. You cannot tell from the sequence
6. Which amino acid is often added to other molecules to increase their water solubility?
A. Ala
B. Asp
C. Gly
D. Pro E. Trp
7. Which amino acid has a polar, non-ionic R-group
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine
E. Tyrosine
8. Which amino acid has the least polar R-group H?
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine E. Tyrosine
9. Which amino acid would have the greatest negative charge at pH = 7.0?
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine E. Tyrosine
10. Which amino acid would likely be least water-soluble at pH 7.0
A. Histidine
,B. Isoleucine
C. Isoleucine or Tyrosine, you cannot tell
D. Serine
E. Tyrosine
11. Which of the following is not considered an uncommon amino acid?
A. thyroxine
B. Hydroxylysine
C. Hydroxyproline
D. Tryptophan
12. Which statement is true about the classification of amino acids
A. Alanine and valine are basic amino acids.
, B. Lysine and arginine are acidic amino acids.
C. Glutamic acid and asparagine are hydrophobic amino acids.
D. Tryptophan and phenylalanine are aromatic amino acids.
E. Methionine and cysteine are hydroxyl-containing amino acids.
13. Which amino acid has a basic R group?
A. Glutamic Acid
B. Histidine
C. Isoleucine
D. Serine
E. Tyrosine
14. Which of the following can be considered a unique characteristic of histidine?
A. Its side chain is attached to the alpha carbon
B. It has a basic side chain
C. It has a side chain that is chemically basic but has an acidic pKa
D. It is technically an “imino” acid
15. Which amino acids would migrate furthest toward the anode (positive electrode) during
electrophoresis?
A. Aspartic acid.
B. Arginine.
C. Tyrosine.
D. Histidine. E. Glutamine.
16. What is the charge on the tetrapeptide lys-lys-his-glu at pH 7?
A. 0
B. +1
C. +2
D. -1
17. The pKa values of the alpha carboxyl groups of common amino acids are around
A. pH 2
B. pH 5
