Metabolism practice questions

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The activity of an enzyme that exhibits Michaelis-Menten kinetics
reaches a limiting activity (Vmax) at a saturating substrate concentration.
1 of 20
The glycolytic pathway has diverse functions. Which of the following processes is
not directly associated with this pathway?
generation of carbon dioxide
2 of 20
Metabolic networks involve enzymes to
increase the rate of biochemical reactions.
3 of 20
Living organisms do not violate the 2nd law of thermodynamics because
they are thermodynamically ‘open’ systems.
4 of 20
Monosaccharides can form inter-molecular glycosidic bonds through
condensation of hydroxyls on one of the carbohydrate molecules.
5 of 20
'Hexokinase is the rate-limiting step of glycolysis’ is a statement that is
incorrect, because phosphofructokinase is.
6 of 20
Which of the following mitochondrial respiratory complexes is involved in the
oxidation of glucose, glycerol-3-phospate and fatty acid?
NADH dehydrogenase (Complex I)
7 of 20
When mixed with an aqueous buffer, glycerophospholipids form micelles or
liposomes because the _________ nature of these molecules
When mixed with an aqueous buffer, glycerophospholipids form micelles or
liposomes because the _________ nature of these molecules
8 of 20
Chronic hyperglycaemia in uncontrolled type 2 diabetes increases the level of
circulating
Glucose
9 of 20
In spectrophotometry, what are the units of an extinction coefficient?
nm
10 of 20
. LDL is considered ‘bad’ cholesterol because this lipoprotein facilitates cholesterol
transport to the
The periphery
11 of 20
Competitive enzyme inhibitors
bind to the enzyme-substrate complex and lower the enzyme’s substrate affinity.
12 of 20
. Hypercholesterolemia manifests itself as too high a level of low-density lipoprotein
(LDL) in the bloodstream. High blood LDL is directly caused by __________ of LDL by
the liver
decreased receptor-mediated exocytosis
13 of 20
. Which of the following is not a common feature of the catabolism of both glucose and
fatty acid?
molecular activation in the cytosol of the cell
14 of 20
Mitochondrial respiration allows the generation of an electrochemical proton gradient
across the mitochondrial inner membrane because it
is an enrocess.dergonic p
15 of 20
Lowered sensitivity of peripheral organs to insulin contributes to the hyperglycaemia
that is associated with type 2 diabetes. In healthy people, insulin
inhibits hepatic gluconeogenesis.
16 of 20
. Lactic acidosis can occur when skeletal muscle rapidly breaks down glycogen as part
of a ‘flight-or-fight’ response. The human body normally prevents this potentially fatal
blood acidification by running the Cori cycle, which
uses lactate in the liver to form glucose.
17 of 20
. Glycogen synthesis is an anabolic process that is triggered by the accumulation of
glucose-6-phosphate
18 of 20
Non-shivering thermogenesis in new-born babies is enabled by the high ________
content of their brown fat mitochondria.
upling proteinunco
19 of 20
Damaged proteins are escorted to a ___________ for degradation following
____________.
proteasome, polyubiquitination
20 of 20

Other cards in this set

Card 2

Front

The glycolytic pathway has diverse functions. Which of the following processes is
not directly associated with this pathway?

Back

generation of carbon dioxide

Card 3

Front

Metabolic networks involve enzymes to

Back

Preview of the front of card 3

Card 4

Front

Living organisms do not violate the 2nd law of thermodynamics because

Back

Preview of the front of card 4

Card 5

Front

Monosaccharides can form inter-molecular glycosidic bonds through

Back

Preview of the front of card 5
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