BCH403 FINAL EXAM REVIEW |
2025 UPDATE WITH COMPLETE
SOLUTIONS
A bilayer is modified to replace the following phospholipid (PE 16:2/16:2) with a different
phospholipid (PE 14:2/14:2). The new bilayer is less fluid and has a higher Tm. -
Answer-False
The sodium-glucose transporter is an example of __________. - Answer-Secondary
active symport
The role of Serine-195 of trypsin can best be described as: - Answer-A highly reactive
nucleophile
Lateral diffusion occurs within a lipid bilayer and requires help from an enzyme. -
Answer-False
Cholesterol is added to a biological membrane to a final concentration of 20%. What
effect does this have on the physical properties of the membrane? - Answer-The
transition phase of the membrane between gel and liquid states has broadened.
What nomenclature matches the following fatty acid? - Answer-20:4 cΔ5,8,11,14
Passive transport that does not require an interaction between the membrane protein
and a solute will display linear transport kinetics. - Answer-True
The following protein is cleaved by chymotrypsin. How many separate peptides are
formed?
SAAGTFEGSWEEDASFGAGYTSKG - Answer-5
A situation where the both the enzyme and the substrate alter their conformation when
they bind together is an example of which of the following: - Answer-Induced fit model of
substrate binding
Chymotrypsin and Trypsin are examples of convergent evolution. - Answer-False
EXAM 4 STARTS HERE - Answer-EXAM 4 STARTS HERE
__________ is the last common intermediate of triacylglycerol biosynthesis and all
glycerophospholipid biosynthesis. - Answer-Phosphatidic acid
, AMP-activated protein kinase (AMPk) is activated under: - Answer-Low energy charge
Acetyl-CoA used to synthesize fatty acids: - Answer-is generated in the cytoplasm by
ATP citrate lyase
The final round of beta (β) oxidation will yield (assume odd number of saturated
carbons): - Answer-1 FADH2, 1 NADH, 1 Acetyl-CoA, 1 propionyl-CoA
Ammonia is used to synthesize ___________ in non-muscle tissue to safely transport
ammonia to the liver. - Answer-Glutamine
To digest triacylglycerol (fat), __________ requires colipase. - Answer-Insulin
__________ are derived from arachidonic acid. - Answer-Eicosanoids
Ubiquitination is required for protein degradation via: - Answer-Proteasome
In one carbon metabolism, methyl groups originate from: - Answer-Serine
Skeletal muscles can function under insufficient oxygen when using __________ as a
fuel source. - Answer-glucose
The regulated step of fatty acid biosynthesis is: - Answer-Acetyl-CoA carboxylase
The two NH3 groups used to synthesize urea enter the Urea Cycle via: - Answer-
carbamoyl phosphate and aspartate
Glycogenolysis in the liver is active during: - Answer-the fast state
__________ is limited to only utilizing glucose for energy production. - Answer-
Erythrocytes
__________ synthesizes glutamine. - Answer-Glutamine synthetase
Which of the following amino acids is not used for ammonia detoxification in humans? -
Answer-Methionine
Lipoprotein lipases digest triacylglycerols (fat) in: - Answer-very low density lipoproteins
The regulated step of beta (β) oxidation is: - Answer-Carnitine acyltransferase I
Glucagon decreases __________ in the liver, while epinephrine increases __________
in the skeletal muscles. (Note: answer fills both blanks) - Answer-glycolysis
Ketolysis cannot occur in the liver as it lacks: - Answer-3-oxoacid CoA transferase
2025 UPDATE WITH COMPLETE
SOLUTIONS
A bilayer is modified to replace the following phospholipid (PE 16:2/16:2) with a different
phospholipid (PE 14:2/14:2). The new bilayer is less fluid and has a higher Tm. -
Answer-False
The sodium-glucose transporter is an example of __________. - Answer-Secondary
active symport
The role of Serine-195 of trypsin can best be described as: - Answer-A highly reactive
nucleophile
Lateral diffusion occurs within a lipid bilayer and requires help from an enzyme. -
Answer-False
Cholesterol is added to a biological membrane to a final concentration of 20%. What
effect does this have on the physical properties of the membrane? - Answer-The
transition phase of the membrane between gel and liquid states has broadened.
What nomenclature matches the following fatty acid? - Answer-20:4 cΔ5,8,11,14
Passive transport that does not require an interaction between the membrane protein
and a solute will display linear transport kinetics. - Answer-True
The following protein is cleaved by chymotrypsin. How many separate peptides are
formed?
SAAGTFEGSWEEDASFGAGYTSKG - Answer-5
A situation where the both the enzyme and the substrate alter their conformation when
they bind together is an example of which of the following: - Answer-Induced fit model of
substrate binding
Chymotrypsin and Trypsin are examples of convergent evolution. - Answer-False
EXAM 4 STARTS HERE - Answer-EXAM 4 STARTS HERE
__________ is the last common intermediate of triacylglycerol biosynthesis and all
glycerophospholipid biosynthesis. - Answer-Phosphatidic acid
, AMP-activated protein kinase (AMPk) is activated under: - Answer-Low energy charge
Acetyl-CoA used to synthesize fatty acids: - Answer-is generated in the cytoplasm by
ATP citrate lyase
The final round of beta (β) oxidation will yield (assume odd number of saturated
carbons): - Answer-1 FADH2, 1 NADH, 1 Acetyl-CoA, 1 propionyl-CoA
Ammonia is used to synthesize ___________ in non-muscle tissue to safely transport
ammonia to the liver. - Answer-Glutamine
To digest triacylglycerol (fat), __________ requires colipase. - Answer-Insulin
__________ are derived from arachidonic acid. - Answer-Eicosanoids
Ubiquitination is required for protein degradation via: - Answer-Proteasome
In one carbon metabolism, methyl groups originate from: - Answer-Serine
Skeletal muscles can function under insufficient oxygen when using __________ as a
fuel source. - Answer-glucose
The regulated step of fatty acid biosynthesis is: - Answer-Acetyl-CoA carboxylase
The two NH3 groups used to synthesize urea enter the Urea Cycle via: - Answer-
carbamoyl phosphate and aspartate
Glycogenolysis in the liver is active during: - Answer-the fast state
__________ is limited to only utilizing glucose for energy production. - Answer-
Erythrocytes
__________ synthesizes glutamine. - Answer-Glutamine synthetase
Which of the following amino acids is not used for ammonia detoxification in humans? -
Answer-Methionine
Lipoprotein lipases digest triacylglycerols (fat) in: - Answer-very low density lipoproteins
The regulated step of beta (β) oxidation is: - Answer-Carnitine acyltransferase I
Glucagon decreases __________ in the liver, while epinephrine increases __________
in the skeletal muscles. (Note: answer fills both blanks) - Answer-glycolysis
Ketolysis cannot occur in the liver as it lacks: - Answer-3-oxoacid CoA transferase
