UNE Biochemistry Unit 1 TEST Exam 2026 || Most
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A 19-year-old boy is diagnosed with Creutzfeldt-Jakob Disease
which is caused by the introduction of an amyloid fold in the
disease-causing
protein. The introduction of this fold causes the protein to
transition from a primarily α-helical structure to an aggregate of
mostly β-sheets. This change in protein structure (leading to
disease) is best attributed to changes in which of the
following?
Folding of the secondary structures
α-helices and β-sheets are primarily stabilized by which of the
following interactions
Hydrogen bonding
,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
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
d) a large transmemberane protein with seven alpha helical
domains
a multimeric protein that contains multiple peptide chains
,A decrease in blood pH from 7.0 to 6.0 would be accompanied
by which of the following changes in ion concentration?
A 10-fold increase in hydrogen ion concentration-
Explanation: The pH is the negative log of the hydrogen ion
concentration, [H+]. At a pH of 7.0 [H+] is 10-7; and at pH 6.0[H+] is
10-6. The [H+] has changed by a factor of 10-6/10-7 which is 10. A
decrease in 1 pH units is a 10 fold increase in [H+]
Cleavage of fructose 1, 6-bisphosphate to dihydroxyacetone and
glyceraldehyde 3-phosphate is achieved by what class of
enzymes?
Lyase
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?
Troponin
, Which of the following is the best description of primary protein
structure?
A newly synthesized strand of amino acids
Discriminate between primary, secondary, tertiary, and
quaternary protein structure (Overview Figure 7.1)
An enzyme has a mutation within the substrate binding site that
reduces the binding of the coenzyme needed for covalent
catalysis. Which of the following is likely to result as a
consequence of this mutation?
The enzyme will not be able to form the transition state complex
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
Lyase
Recent Exam Actual Complete Real Exam
Questions And Correct Answers (Verified Answers)
Already Graded A+ | Guaranteed Success!! Newest
Exam | Just Released!! CHEM 1050\University of
New England
A 19-year-old boy is diagnosed with Creutzfeldt-Jakob Disease
which is caused by the introduction of an amyloid fold in the
disease-causing
protein. The introduction of this fold causes the protein to
transition from a primarily α-helical structure to an aggregate of
mostly β-sheets. This change in protein structure (leading to
disease) is best attributed to changes in which of the
following?
Folding of the secondary structures
α-helices and β-sheets are primarily stabilized by which of the
following interactions
Hydrogen bonding
,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
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
d) a large transmemberane protein with seven alpha helical
domains
a multimeric protein that contains multiple peptide chains
,A decrease in blood pH from 7.0 to 6.0 would be accompanied
by which of the following changes in ion concentration?
A 10-fold increase in hydrogen ion concentration-
Explanation: The pH is the negative log of the hydrogen ion
concentration, [H+]. At a pH of 7.0 [H+] is 10-7; and at pH 6.0[H+] is
10-6. The [H+] has changed by a factor of 10-6/10-7 which is 10. A
decrease in 1 pH units is a 10 fold increase in [H+]
Cleavage of fructose 1, 6-bisphosphate to dihydroxyacetone and
glyceraldehyde 3-phosphate is achieved by what class of
enzymes?
Lyase
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?
Troponin
, Which of the following is the best description of primary protein
structure?
A newly synthesized strand of amino acids
Discriminate between primary, secondary, tertiary, and
quaternary protein structure (Overview Figure 7.1)
An enzyme has a mutation within the substrate binding site that
reduces the binding of the coenzyme needed for covalent
catalysis. Which of the following is likely to result as a
consequence of this mutation?
The enzyme will not be able to form the transition state complex
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
Lyase
