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28 Cards in this Set
- Front
- Back
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67-It should be possible to reconstitute the abilities of the vesicles if which of the following is added? |
Intact ATP synthase |
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68-The accompanying figure shows the electron transport chain. Which of the following is the combination of substances that is initially added to the chain? |
NADH,FADH2, and electrons |
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69-which of the following most accurately describes what is happening along this chain? |
Each electron carrier alternates between being reduce and being oxidized. |
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70-The parts of the figure labeled with Roman numerals symbolize what concept? |
Multimeric proteins in 4 complexes. |
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71-What happens to the end of the chain? |
4 electrons combine with oxygen and protons |
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72- which of the following couples chemiosmosis to energy storage? |
ATP synthase |
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73- which of the following describes ubiquinone? |
A small hydrophobic coenzyme |
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74-which of the following normally occurs whether or not oxygen (o2) is present? |
Glycolysis |
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75- which of the following occurs in the cytosol of a eukaryotic cell? |
Glycolysis and fermentation |
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76- which of the metabolic pathway is common to both cellular respiration and fermentation? |
Glycolysis |
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77- the ATP made during fermentation is generated is generated by which of the following? |
Substrate-level phosphorylation |
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78- in the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of.... |
ATP, CO2, and ethanol (ethyl alcohol). |
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79- in alcohol fermentation, NAD+ is regenerated from NADH during which of the following? |
Reduction of acetaldehyde to ethanol (ethyl alcohol) |
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80- one function of both alcohol fermentation and lactic acid fermentation is to |
Oxidize NADH to NAD+ |
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81-An Organism is discovered that consumes a considerable amount of sugar, yet does not gain much weight when the night air. Curiously, The consumption of sugar increases as air is removed from the organisms environment, but the organism seems to thrive even in the absence of air. When returned to normal air, organism does fine. Which of the following best describes the organism? |
It is a facultative anaerobe |
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82- glycolysis is thought to be one of the most ancient of metabolic processes. Which statement supports this idea? |
Glycolysis is the most widespread metabolic pathway |
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83- why is glycolysis considered to be one of the first metabolic pathways to have evolved? |
It is found in the cytosol, does not involve oxygen, and is present in most organisms. |
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84 – muscle cells, when an individual is exercising heavily and one the muscle becomes oxygen deprived, convert pyruvate to lactate. What happens to the lactate in skeletal muscle cells? |
it is taken to the liver and converted back to pyruvate |
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85– when muscle cells are oxygen deprived, the heart still pumps. What must the heart cells be able to do? |
Continue aerobic Metabolism when skeletal muscle cannot |
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86– when muscle cells undergo anaerobic respiration, they become fatigued and painful. This is now known to be caused by |
Increase in potassium ions |
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87- you have a friend who lost 7 kg(about 15 pounds) A flat on a low-carb diet. How did the fat leave her body? |
It was released as CO2 and H2O |
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88- Phosphofructokinase is an important control enzyme in the regulation of cellular respiration. Which of the following statements describes the function of phosphofructokinase? |
It is an allosteric enzyme |
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89- Phosphofructosekinase is an allosteric enzyme that catalyzes the conversion of fructose-6-phosphate to fructose – 1,6 – bisphosphate, And early step of glycolysis. In the presence of oxygen, an increase in the amount of ATP in a cell would be expected to |
Inhibit the enzyme and thus slow the rate of glycolysis and the citric acid cycle |
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90- even though plants carry on photosynthesis, plant cells still use their mitochondria for oxidation or pyruvate. When and where will this occur? |
In photosynthesizing cells in dark periods and in other tissues all the time |
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91-in vertebrate animals, brown fat tissue's color is due to abundant mitochondria. White fat tissue, on the other hand, is specialized for fat storage and contains relatively few mitochondria. Brown fat cells have a specialized protein that dissipates the proton-motive force across the mitochondrial membranes. Which of the following might be the function of the brown fat tissues? |
To regulate temperature by converting energy from NADH oxidation to heat |
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92-what is the purpose of beta oxidation in respiration? |
Breakdown of fatty acids |
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92-what is the purpose of beta oxidation in respiration? |
Breakdown of fatty acids |
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Where do the catabolic products of fatty acid breakdown enter into the citric acid cycle? |
Acetyl CoA |
