UNE Biochem Unit 1 UPDATED ACTUAL
Questions with CORRECT Answers
Which of the following proteins is likely to have quaternary structure?
a. A protein that contains both a-helix and B-sheet secondary structures
b. A large transmembrane protein with seven a-helical domains
c. A small protein consisting of a single amino acid chain
d. A multimeric protein that contains multiple peptide chains - CORRECT ANSWER - d. a
multimeric protein that contains multiple peptide chains
As hemoglobin transitions between the T-state and the R-state, which of the following is broken
as oxygen is added?
a. Hydrogen bonding
b. Iron-Nitrogen links
c. Alpha helixes
d. Salt bridges - CORRECT ANSWER - d. salt bridges
Myoglobin is a _____ protein. Hemoglobin is a ______ protein.
a. Monomeric, tetrameric
b. Monomeric, monomeric
c. Tetrameric, tetrameric
d. Tetrameric, monomeric - CORRECT ANSWER - a. monomeric, tetrameric
Which of the following amino acids would not be commonly found in the middle of an a-helix?
a. Valine
b. Leucine
c. Proline
d. Tryptophan - CORRECT ANSWER - c. proline
, Hemoglobin bound to heme is termed a holoprotein. The heme group (or porphyrin ring) is
required for oxygen binding and it is defined as which of the following?
a. Heteroprotein
b. Prosthetic group
c. Apoprotein
d. Holoprotein - CORRECT ANSWER - b. prosthetic group
Cleavage of fructose 1,6-bisphosphate to dihydroxyacetone and glyceraldehyde 3-phosphate is
achieved by what class of enzymes?
a. Lyase
b. Ligase
c. Transferase
d. Hydrolase - CORRECT ANSWER - a. lyase
Which of the following proteins will likely be the most stable and have the lowest energy state?
a. A protein structure with a high content of random coils
b. A protein structure that is mostly a-helices
c. A structure with a high content of B-sheets
d. A protein structure that is made up of nucleotide folds - CORRECT ANSWER - c. a
structure with high content B-sheets
Which of the following coenzymes or cofactors would not typically participate in an activation
transfer reaction?
a. NADH
b. Pyridoxal phosphate (PLP)
c. Coenzyme A
d. Thiamine pyrophosphate
e. Biotin - CORRECT ANSWER - a. NADH
Questions with CORRECT Answers
Which of the following proteins is likely to have quaternary structure?
a. A protein that contains both a-helix and B-sheet secondary structures
b. A large transmembrane protein with seven a-helical domains
c. A small protein consisting of a single amino acid chain
d. A multimeric protein that contains multiple peptide chains - CORRECT ANSWER - d. a
multimeric protein that contains multiple peptide chains
As hemoglobin transitions between the T-state and the R-state, which of the following is broken
as oxygen is added?
a. Hydrogen bonding
b. Iron-Nitrogen links
c. Alpha helixes
d. Salt bridges - CORRECT ANSWER - d. salt bridges
Myoglobin is a _____ protein. Hemoglobin is a ______ protein.
a. Monomeric, tetrameric
b. Monomeric, monomeric
c. Tetrameric, tetrameric
d. Tetrameric, monomeric - CORRECT ANSWER - a. monomeric, tetrameric
Which of the following amino acids would not be commonly found in the middle of an a-helix?
a. Valine
b. Leucine
c. Proline
d. Tryptophan - CORRECT ANSWER - c. proline
, Hemoglobin bound to heme is termed a holoprotein. The heme group (or porphyrin ring) is
required for oxygen binding and it is defined as which of the following?
a. Heteroprotein
b. Prosthetic group
c. Apoprotein
d. Holoprotein - CORRECT ANSWER - b. prosthetic group
Cleavage of fructose 1,6-bisphosphate to dihydroxyacetone and glyceraldehyde 3-phosphate is
achieved by what class of enzymes?
a. Lyase
b. Ligase
c. Transferase
d. Hydrolase - CORRECT ANSWER - a. lyase
Which of the following proteins will likely be the most stable and have the lowest energy state?
a. A protein structure with a high content of random coils
b. A protein structure that is mostly a-helices
c. A structure with a high content of B-sheets
d. A protein structure that is made up of nucleotide folds - CORRECT ANSWER - c. a
structure with high content B-sheets
Which of the following coenzymes or cofactors would not typically participate in an activation
transfer reaction?
a. NADH
b. Pyridoxal phosphate (PLP)
c. Coenzyme A
d. Thiamine pyrophosphate
e. Biotin - CORRECT ANSWER - a. NADH
