UNE Medical Biochemistry – Unit 1 Exam |
2025/2026 Updated Edition | 100% Verified
Questions & Correct Answers | Complete Exam
Pack
Which of the following amino acid would not be commonly
found in the middle of a an α-helical domain? - Correct
Answer-Proline.
It is considered a 'helix breaker' and would not be found in an
alpha helix; all other residues are nonpolar hydrophobic and
could reside in a transmemebrane domain.
Changes in the physiological variables listed below can alter
the affinity of hemoglobin for oxygen. Which of the following
will lower the affinity of hemoglobin for oxygen?
a) decrease in protons
b) increase in 2,3 bisphosphoglycerate (BPG)
c) increase in pH
d) decrease in CO2 - Correct Answer-Increase in 2,3
bisphosphoglycerate (BPG)
pg. 1 professoraxe
l
,A 22-year old female presents to the emergency department
with acute abdominal pain. She indicates the pain came on
rapidly in her mid-abdominal region. She has vomited several
times over the last 4 hours. A diagnosis of acute pancreatitis is
made and she is rushed to surgery. Elevation of which of the
following serum enzymes would be consistent with this
diagnosis? - Correct Answer-Amylase
Which of the following is the best description of primary
protein structure? - Correct Answer-A newly synthesized
strand of amino acids
Cleavage of fructose 1, 6-bisphosphate to dihydroxyacetone
and glyceraldehyde 3-phosphate is achieved by what class of
enzymes? - Correct Answer-Lyase
Which of the following amino acid would not be commonly
found in the middle of a an α-helical domain? - Correct
Answer-Proline
Domains are common structural elements that retain a
particular function within the protein. Which of the following
is an example of a protein domain?
pg. 2 professoraxe
l
,a) a prosthetic group such as heme
b) irregular coils and loops
c) an arrangement of β-strands connected by α- helixes
d) a single α- helix - Correct Answer-An arrangement of β-
strands connected by α-helixes
α helices and β sheets are primarily stabilized by which of the
following interactions? - Correct Answer-hydrogen bonding
Hydrogen bonding is the primary stabilizing force in both
secondary structures. In alpha helices the hydrogen bond is
between the carbonyl oxygen group from one peptide bond
and that amide hydrogen from a different peptide bond
approximately amide 4 resides down in the helix. In beta
sheets, the hydrogen bonding is between the carbonyl oxygen
and the amide hydrogen from different peptide strands.
Compare and contrast beta sheets and alpha helical
formations. (Figure 7.3 vs. 7.5)
Phosphorylation of an amino acid changes the charge on the
residue to: - Correct Answer-Negative
pg. 3 professoraxe
l
, The addition of a phospho group will add a large negative
moiety to the amino acid and change the functionality of the
protein.
Which of the following amino acid would not be commonly
found in the middle of a an α-helical domain? - Correct
Answer-Proline
A 55-year old man is brought to the emergency room with a
chief complaint of chest pain and tingling in his left arm.
Elevation of which of the following enzymes in circulation
would be most indicative of a myocardial infarction? - Correct
Answer-Troponin
A 22-year-old female is diagnosed with acute pancreatitis.
Elevation of which of the following serum enzymes would be
consistent with this diagnosis?
a) lactate dehydrogenase
b) amylase
c) troponin
d) creatine kinase - Correct Answer-amylase
pg. 4 professoraxe
l
2025/2026 Updated Edition | 100% Verified
Questions & Correct Answers | Complete Exam
Pack
Which of the following amino acid would not be commonly
found in the middle of a an α-helical domain? - Correct
Answer-Proline.
It is considered a 'helix breaker' and would not be found in an
alpha helix; all other residues are nonpolar hydrophobic and
could reside in a transmemebrane domain.
Changes in the physiological variables listed below can alter
the affinity of hemoglobin for oxygen. Which of the following
will lower the affinity of hemoglobin for oxygen?
a) decrease in protons
b) increase in 2,3 bisphosphoglycerate (BPG)
c) increase in pH
d) decrease in CO2 - Correct Answer-Increase in 2,3
bisphosphoglycerate (BPG)
pg. 1 professoraxe
l
,A 22-year old female presents to the emergency department
with acute abdominal pain. She indicates the pain came on
rapidly in her mid-abdominal region. She has vomited several
times over the last 4 hours. A diagnosis of acute pancreatitis is
made and she is rushed to surgery. Elevation of which of the
following serum enzymes would be consistent with this
diagnosis? - Correct Answer-Amylase
Which of the following is the best description of primary
protein structure? - Correct Answer-A newly synthesized
strand of amino acids
Cleavage of fructose 1, 6-bisphosphate to dihydroxyacetone
and glyceraldehyde 3-phosphate is achieved by what class of
enzymes? - Correct Answer-Lyase
Which of the following amino acid would not be commonly
found in the middle of a an α-helical domain? - Correct
Answer-Proline
Domains are common structural elements that retain a
particular function within the protein. Which of the following
is an example of a protein domain?
pg. 2 professoraxe
l
,a) a prosthetic group such as heme
b) irregular coils and loops
c) an arrangement of β-strands connected by α- helixes
d) a single α- helix - Correct Answer-An arrangement of β-
strands connected by α-helixes
α helices and β sheets are primarily stabilized by which of the
following interactions? - Correct Answer-hydrogen bonding
Hydrogen bonding is the primary stabilizing force in both
secondary structures. In alpha helices the hydrogen bond is
between the carbonyl oxygen group from one peptide bond
and that amide hydrogen from a different peptide bond
approximately amide 4 resides down in the helix. In beta
sheets, the hydrogen bonding is between the carbonyl oxygen
and the amide hydrogen from different peptide strands.
Compare and contrast beta sheets and alpha helical
formations. (Figure 7.3 vs. 7.5)
Phosphorylation of an amino acid changes the charge on the
residue to: - Correct Answer-Negative
pg. 3 professoraxe
l
, The addition of a phospho group will add a large negative
moiety to the amino acid and change the functionality of the
protein.
Which of the following amino acid would not be commonly
found in the middle of a an α-helical domain? - Correct
Answer-Proline
A 55-year old man is brought to the emergency room with a
chief complaint of chest pain and tingling in his left arm.
Elevation of which of the following enzymes in circulation
would be most indicative of a myocardial infarction? - Correct
Answer-Troponin
A 22-year-old female is diagnosed with acute pancreatitis.
Elevation of which of the following serum enzymes would be
consistent with this diagnosis?
a) lactate dehydrogenase
b) amylase
c) troponin
d) creatine kinase - Correct Answer-amylase
pg. 4 professoraxe
l
