29968236
Beschreibung
Quiz von Emily Richards, aktualisiert more than 1 year ago
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Erstellt von Emily Richards
vor mehr als 3 Jahre
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Frage 1
Frage
The citric acid cycle is an example of an amphibolic pathway.
Antworten
- True
- False
Frage 2
Antworten
-
Biotin
-
Coenzyme A
-
Acetyl-CoA
-
Flavin mononucleotide
-
Lipoamide
Frage 3
Frage
The molecule shown above is a cofactor of:
Antworten
-
succinate dehydrogenase
-
citrate synthase
-
alpha-ketoglutarate dehydrogenase
-
succinyl-CoA synthetase
-
pyruvate carboxylase
Frage 4
Frage
Which one of the following enzymes of the citric acid cycle catalyzes an irreversible step?
Antworten
-
isocitrate dehydrogenase
-
succinate dehydrogenase
-
succinyl-CoA synthetase
-
fumarase
-
malate dehydrogenase
Frage 5
Frage
Which of the following conditions decreases the rate of oxidation of acetyl-CoA by the citric acid cycle?
Antworten
-
a low ATP/ADP ratio
-
a low NAD+/NADH ratio
-
a low GTP/GDP ratio
-
a high NAD+/NADH ratio
-
an increase in Ca2+ concentration
Frage 6
Frage
In eukaryotes the enzymes of the citric acid cycle are found in the cytosol.
Antworten
- True
- False
Frage 7
Frage
The citric acid cycle is an anaerobic pathway.
Antworten
- True
- False
Frage 8
Frage
The only reaction in the citric acid cycle that produces a carbon-carbon bond is catalyzed by citrate synthase.
Antworten
- True
- False
Frage 9
Frage
Which enzyme is unique to the glyoxylate cycle?
Antworten
-
malic enzyme
-
malate dehydrogenase
-
isocitrate lyase
-
PEP carboxylase
-
pyruvate carboxylase
Frage 10
Frage
The only reaction of the citric acid cycle that provides substrate level phosphorylation is catalyzed by:
Antworten
-
pyruvate dehydrogenase
-
malate dehydrogenase
-
isocitrate dehydrogenase
-
succinate dehydrogenase
-
succinyl-CoA synthetase
Frage 11
Antworten
-
biotin
-
coenzyme A
-
FAD
-
flavin mononucleotide
-
lipoamide
Frage 12
Frage
The molecule shown above is a cofactor of:
Antworten
-
succinate dehydrogenase
-
citrate synthase
-
isocitrate dehydrogenase
-
succinyl-CoA synthetase
-
pyruvate carboxylase
Frage 13
Frage
Which one of the following enzymes of the citric acid cycle catalyzes an irreversible step?
Antworten
-
succinyl-CoA synthetase
-
succinate dehydrogenase
-
citrate synthase
-
fumarase
-
malate dehydrogenase
Frage 14
Frage
In mammalian tissues, isocitrate dehydrogenase is allosterically stimulated by
Antworten
-
high ATP/ADP ratio
-
low NAD+/NADH ratio
-
low acetyl CoA/CoA ratio
-
high NAD+/NADH ratio
-
a decrease in Ca2+ concentration
Frage 15
Frage
In eukaryotes the enzymes of the citric acid cycle are found in the mitochondria.
Antworten
- True
- False
Frage 16
Frage
The citric acid cycle is an anaerobic pathway.
Antworten
- True
- False
Frage 17
Frage
The only reaction in the citric acid cycle that produces substrate level phosphorylation is catalyzed by citrate synthase.
Antworten
- True
- False
Frage 18
Frage
All of the statements below about the glyoxylate pathway are true EXCEPT:
Antworten
-
The enzymes of the glyoxylate pathway are found in the glyoxysomes.
-
The glyoxysomes contain all of the enzymes of the citric acid cycle.
-
The glyoxylate pathway allows plants, yeast, and microorganisms to thrive using acetate as the sole carbon source.
-
The glyoxylate pathway bypasses the two oxidative decarboxylation reactions of the citric acid cycle.
-
In the glyoxylate pathway, isocitrate is routed through isocitrate lyase and malate synthase.
Frage 19
Frage
The anaplerotic reactions associated with the citric acid cycle are a result of:
Antworten
-
The use of many of the citric acid cycle intermediates in biosynthesis.
-
The oxidative nature of the citric acid cycle.
-
The decarboxylation reactions of the citric acid cycle.
-
The production of reduced coenzymes.
-
The irreversible nature of three citric acid cycle reactions.
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