UNE Medical Biochemistry Unit 1 EXAM
QUESTIONS AND ANSWERS|UPDATED
VERSION|2025/2026
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
Movement of ammonia from an amino acid to an alpha-keto acid involves a
family of enzymes best categorized as:
a) transferases
b) ligases
c) lyases
d) isomerases - Correct Answer-transferases
Which of the following proteins is likely to have quaternary structure?
a) a protein that contains both α-helix and β-sheet secondary structures
b) a multimeric protein that contains multiple peptide chains
c) a small protein consisting of a single amino acid chain
pg. 1 professoraxe l
, d) a large transmemberane protein with seven alpha helical domains - Correct
Answer-a multimeric protein that contains multiple peptide chains
Cleavage of fructose 1, 6 bisphosphate to dihydroxyacetone and glyceraldehyde
3-phosphate is achieved by what class of enzymes?
a) ligase
b) lyase
c) transferase
d) hydrolase - Correct Answer-Lyase
Which of the following best describes the structure of heme?
a) a planar porphyrin ring that binds iron
b) a nicotinamide structure that is readily oxidized
c) an n-linked glycosylation
d) a negatively charged phosphate group - Correct Answer-a planar porphyrin ring
that binds iron
Prosthetic groups are complex nonprotein molecules that participate in catalysis
by providing functional groups that form a covalent intermediate between the
enzyme and the substrate. Which of the following is an example of a coenzyme or
cofactor that participates in a covalent catalysis reaction?
a) ATP
b) OH-
pg. 2 professoraxe l
QUESTIONS AND ANSWERS|UPDATED
VERSION|2025/2026
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
Movement of ammonia from an amino acid to an alpha-keto acid involves a
family of enzymes best categorized as:
a) transferases
b) ligases
c) lyases
d) isomerases - Correct Answer-transferases
Which of the following proteins is likely to have quaternary structure?
a) a protein that contains both α-helix and β-sheet secondary structures
b) a multimeric protein that contains multiple peptide chains
c) a small protein consisting of a single amino acid chain
pg. 1 professoraxe l
, d) a large transmemberane protein with seven alpha helical domains - Correct
Answer-a multimeric protein that contains multiple peptide chains
Cleavage of fructose 1, 6 bisphosphate to dihydroxyacetone and glyceraldehyde
3-phosphate is achieved by what class of enzymes?
a) ligase
b) lyase
c) transferase
d) hydrolase - Correct Answer-Lyase
Which of the following best describes the structure of heme?
a) a planar porphyrin ring that binds iron
b) a nicotinamide structure that is readily oxidized
c) an n-linked glycosylation
d) a negatively charged phosphate group - Correct Answer-a planar porphyrin ring
that binds iron
Prosthetic groups are complex nonprotein molecules that participate in catalysis
by providing functional groups that form a covalent intermediate between the
enzyme and the substrate. Which of the following is an example of a coenzyme or
cofactor that participates in a covalent catalysis reaction?
a) ATP
b) OH-
pg. 2 professoraxe l
