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Nicotinamide adenine dinucleotide: Quiz

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Question 1: [36] However, this fold is not universal among NAD-dependent enzymes, since a class of bacterial enzymes involved in ________ metabolism have recently been discovered that bind the coenzyme, but lack this motif.
Cystathionine beta synthaseL-DOPAAmino acidAmino acid synthesis

Question 2: Here, reduced compounds such as ________ are oxidized, thereby releasing energy.
CarbohydrateGlucoseSucroseFructose

Question 3: [7] The properties of the fluorescence signal changes when NADH binds to proteins, so these changes can be used to measure ________, which are useful in the study of enzyme kinetics.
Dissociation constantAcid dissociation constantBinding selectivityChemical equilibrium

Question 4: In ________ the electrons carried by the NADH that is produced in the cytoplasm by glycolysis are transferred into the mitochondrion (to reduce mitochondrial NAD+) by mitochondrial shuttles, such as the malate-aspartate shuttle.
EukaryoteFungusPlantProtist

Question 5: Upon decomposition, they form products that are ________.
ProteinEnzyme kineticsMetabolismEnzyme inhibitor

Question 6: The correct names for these enzymes contain the names of both their substrates: for example NADH-ubiquinone oxidoreductase catalyzes the oxidation of NADH by ________.
Coenzyme Q10Adenosine triphosphateNicotinamide adenine dinucleotideLipoic acid

Question 7: [82] In the early 1940s, ________ made another important contribution towards understanding NAD+ metabolism, by being the first to detect an enzyme in the biosynthetic pathway.
Marshall Warren NirenbergDavid BaltimoreArthur KornbergJames D. Watson

Question 8: The salvage pathways used in microorganisms differ from those of ________.
Even-toed ungulateMammal classificationPrimateMammal

Question 9: A source of nicotinamide was identified in 1938, when Conrad Elvehjem purified ________ from liver and showed this vitamin contained nicotinic acid and nicotinamide.
AtorvastatinNiacinFenofibrateNicotinyl alcohol

Question 10: [15] The effects of the NAD+/NADH ratio are complex, controlling the activity of several key enzymes, including ________ and pyruvate dehydrogenase.
EnolaseAldolase AGlyceraldehyde 3-phosphate dehydrogenaseHexokinase







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