CHEM 1005: Medical Biochemistry Unit 3 Module pre-quizzes and quizzes Questions with complete solutions
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Course
CHEM 1005
Institution
University Of New England (UNE
)
Which of the following is the major regulation point for transport of fatty acids into the mitochondria? correct answer: carnitine acyltransferase I
The primary activation of triacylglycerol mobilization in adipocytes is through __________ of the enzyme ____________. correct answer: phosphoryl...
CHEM 1005: Medical Biochemistry Unit 3
Module pre-quizzes and quizzes Questions
with complete solutions
Which of the following is the major regulation point for
transport of fatty acids into the mitochondria? correct answer:
carnitine acyltransferase I
The primary activation of triacylglycerol mobilization in
adipocytes is through __________ of the enzyme
____________. correct answer: phosphorylation; hormone
sensitive lipase
Which of the following lipoproteins distributes dietary lipids?
correct answer: chylomicron
Which of the following statements regarding lipid digestion and
absorption is true? correct answer: The products of lipid
digestion are resynthesized into triacylglycerols in intestinal
epithelial cells.
The emulsification of fats:
A. results in the formation of small fat droplets.
B. depends upon the amphipathic structure of bile salts.
C. results in the formation of micelles. correct answer: A, B and
C.
results in the formation of small fat droplets.
depends upon the amphipathic structure of bile salts.
results in the formation of micelles.
,In animals, the bulk of energy is stored as __________. correct
answer: triacylglycerols
Under fasting conditions, elevated glucagon will activate:
correct answer: hormone sensitive lipase
VLDL characteristic of which aproprotein: correct answer: Apo
B 100
Which sphingolipid is a precursor for all other types of
sphingolipids? correct answer: Ceramide.
Which of the following is the regulated step of fatty acid
synthesis in eukaryotes? correct answer: Carboxylation of
acetyl CoA.
The first step in fatty acid synthesis is the formation of
________ from acetyl CoA and carbon dioxide. correct answer:
malonyl CoA
The role of biotin in fatty acid biosynthesis is in ____________.
correct answer: malonyl CoA formation.
In chylomicro assembly which Apo protein is transferred from
HDL? correct answer: Apo CII
Regulation of acetylCoA carboxylase takes place on several
levels. When glucose is low: correct answer: Citrate levels are
low
,When the liver converts excess glucose into fatty acids (insulin
in high) which of the following is false correct answer:
Lipoprotein lipase activity is low
There are several factors that regulate the rate of b-oxidation.
which is false? correct answer: 5) In the fasting state, lipolysis
is inhibited by phosphorylation of hormone sensitive lipase
All of the following would be expected during an extended fast
(starvation) except: correct answer: 5) the liver would begin to
use ketones for energy after 24 hours
Which of the following is the regulated step of fatty acid
synthesis in eukaryotes? correct answer: Carboxylation of
acetyl CoA.
In the case of a deficiency of biotin, which process of fatty acid
metabolism would be impacted: correct answer: synthesis of
malonyl CoA
Shortly after a high fat meal you would expect which of the
following lipoproteins to be elevated in the blood? correct
answer: chylomicrons
The transport of newly synthesized fatty acids to the adipose
requires all of the following except: correct answer: Carnitine to
shuttle the fatty acids out of the mitochondria
In the mitochondrion, as a ______________ moves from the
intermembrane space to the matrix, ___________ is transported
, in the opposite direction. correct answer: fatty acyl-carnitine;
carnitine
Which of the following represents the correct sequence of events
in a cycle of β-oxidation beginning with a saturated fatty acyl-
CoA? correct answer: FAD-coupled oxidation, hydration,
NAD+-coupled oxidation, thiolytic cleavage
Low levels of oxaloacetate with high levels of β-oxidation cause
the production of what metabolites, particularly within the liver?
correct answer: acetoacetate and β-hydroxybutyrate
An increase in adiponectin levels will: correct answer:
INCORRECT:decrease glucose uptake
Under conditions of starvation, all of the following are true
except: correct answer: Malonyl CoA will be elevated
HDL particles donate which Apo protein to VLDL: correct
answer: ApoCII
Cholesterol is a precursor for each of the following, except...
correct answer: vitamin C
HDL particles are characterized by the presence of which
apoprotein: correct answer: ApoA
Transcriptional regulation of cholesterol synthesis occurs via
transcription factors bind: correct answer: a steroid response
element
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