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Key Concepts Quiz


This activity contains 17 questions.

Question 1
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Sunlight is essential for the varied life on Earth. Sunlight provides energy to photosynthetic organisms by providing _____.
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Question 2
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Lungs are to breathing as _____ are to cellular respiration.
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Question 3
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When a car engine burns gasoline, the results of the reaction are similar to when cells burn glucose. Both reactions release carbon dioxide and water. In cells, the chemical energy in food is converted to ATP and heat. In a moving car, the chemical energy in gasoline is converted to _____.
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Question 4
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Given the relatively modest number of calories burned by anything but the most vigorous activities, why can people consume over 2,000 kilocalories a day, yet maintain a healthy body weight?
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Question 5
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A molecule that functions as the electron donor in a redox reaction _____.
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Question 6
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In cellular respiration, glucose _____ electrons, while _____ electrons.
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Question 7
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Oxidative phosphorylation could not occur without glycolysis and the citric acid cycle, because _____.
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Question 8
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Glycolysis is the only stage of cellular respiration that _____.
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Question 9
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We inhale O2 and we exhale CO2. Carbon dioxide is produced _____.
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Question 10
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A scientist wants to study the enzymes of the citric acid cycle in eukaryotic cells. What part of the cell would they use as a source of these enzymes?
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Question 11
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What molecule is required to move pyruvate to the citric acid cycle?
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Question 12
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In oxidative phosphorylation, electrons are passed from one electron carrier to another. The energy released is used to _____.
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Question 13
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Dinitrophenol (DNP) is a highly toxic, membrane uncoupler. What happens when DNP makes the phospholipid bilayer of inner mitochondrial membranes permeable to protons (H+)?
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Question 14
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Some human cells are restricted to aerobic respiration to recycle NADH and FADH2. If these cells are deprived of oxygen, then _____.
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Question 15
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Humans depend on oxygen to sustain life. However, at the cellular level, muscle cells are _____.
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Question 16
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Fat is the most efficient molecule for long-term energy storage even compared to carbohydrates because _____.
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Question 17
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Using the ATP generated during cellular respiration, the intermediates of glycolysis and the citric acid cycle can be siphoned off and used _____.
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