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29 Cards in this Set
- Front
- Back
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If an inhibitor changes the slope of the Lineweaver-Burk graph, but not the x-intercept, it is this type of inhibition: |
Competitive |
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Which of the following enzymes is not a serine protease? |
Aspartyl transcarbamylase (ATCase) |
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What characteristic is most used to define lipids? |
Solubility |
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Which of the following is not a characteristic of most fatty acids? |
Presence of trans double bonds |
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Which of the following bases is not found in RNA? |
T |
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Which contains a phosphoanhydride bond? |
ATP |
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Protein synthesis can occur while the mRNA molecule is being synthesized in: |
Prokaryotes only
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An important process in the synthesis of new DNA is |
proofreading and repair unwinding of the double helix protection of single-stranded regions form nuclease action All |
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Final |
Final |
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Which of the following statements concerning the citric acid cycle as the central metabolic pathway is true? |
It is involved in the metabolism of sugars and amino acids It is involved in the metabolism of amino acids and lipids It links anaerobic metabolism to aerobic metabolism Many of its intermediates are starting points for synthesis of a variety of compounds All |
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Which enzymes in the citric acid cycle catalyze oxidative decarboxylation reactions |
isocitrate dehydrogenase and the a-ketoglutarate dehydrogenase complex |
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In which cellular location do the majority of the reactions of the citric acid cycle take place? |
the mitochondrial matrix |
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Which of the following vitamins and enzyme cofactors are used by the pyruvate dehydrogenase complex during oxidative decarboxylation? |
Lipoid Acid Niacin Pantothenic Acid Thiamine All |
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Which of the reactions of the citric acid cycle requires FAD as a coenzyme? |
The conversion of succinate to fumarate
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A cell in an active metabolic state has
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a low (ATP/ADP) and a low (NADH/NAD+) ratio |
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The glyoxylate pathway bypasses part of the citric acid cycle by converting isocitrate to glyoxylate and |
succinate |
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The citric acid cycle is considered part of aerobic metabolism even though oxygen does not appear explicitly in any reaction because |
the NADH and FADH2 produced are reoxidizes in the electron transport chain linked to oxygen |
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How many electrons are required for the complete reduction of one molecule of oxygen gas? |
Four |
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Which the following statements concerning Eº for an electron-transfer reaction is false? |
It is measured by comparison with the partial pressure of oxygen in the bloodstream rather than 1 atmosphere pressure |
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Complex III of the electron transport chain oxidizes___, reduces ____, and _____ protons in the process. |
coenzyme Q; cytochrome c; pumps |
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The Q cycle referee to flow of electrons from |
coenzyme Q to cytochrome c via Complex III |
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The cytochrome that passes electrons directly to oxygen is |
the cytochrome a/a3 complex |
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Most of the reactions of electron transport in the mitochondria occur |
on the inner membrane |
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Electron flow in the mitochondria follows this pathway: |
NADH-->FMN-->Coenzyme Q-->Cyt B-->Cyt C--> Cyt A--> O2 |
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The factor that couples electron transport to phosphorylation of ADP is |
a protein oligomer |
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The P/O ration refers to the number of moles to ATP produces for each mole of |
oxygen atoms consumed in electron transport |
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Which of the following compounds does not overlap between several pathways? |
Cholesterol |
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In which part of the chloroplast does production of oxygen during photosynthesis primarily occur? |
Thylakoid disks |
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In which part of the chloroplast does reduction of CO2 during photosynthesis primarily occur? |
Stroma |
