03.6. Some students have the misconception that during cellular respiration, the
ID: 145026 • Letter: 0
Question
03.6. Some students have the misconception that during cellular respiration, the matter in glucose is somehow turned into energy. Consider that when we exercise, we burn glucose and also lose mass. Why does this happen? O Our cells use up the potential energy stored in glucose, and losing that energy during exercise reduces our mass. Our cells convert the mass in glucose into energy, which is weightless. Our cells convert the mass in glucose into energy that is used during exercise. Losing that energy reduces our mass Our cells convert glucose into CO2 and water, which are eliminated from our bodies when we exercise. Q3.7. Which of the following would DECREASE the number of ATP molecules generated per NADH molecule in the electron transport chain? Increasing the energy of the electrons NADH transfers to Complex I Reducing the number of protons required by ATP synthase to produce an ATP molecule Having NADH transfer its electrons to Complex Ill instead of Complex I Increasing the amount of oxygen available to the celExplanation / Answer
3.6 C6H12O6 + 6O2 6CO2 + 6H2O + ATP, we lose mass in the form of CO2 and H2O.
Option (3)
3.7 If NADH doesn't transfer its electrons to Complex 1 then QH2 won't be formed and it won't carry the electrons to the following complexes. Low H+ will be produced resulting in low ATP.
Option (3)
3.8 If the electrons don't reach complex 4, then no. of H+ ions produced would be less thereby reducing the production of ATP from ATP synthase. This creates a condition in which ATP demand is more than supply, like during exercise.
Option (4)
3.9 The gradient of H+ ions is from intermembrane space to the mitochondrial matrix. Moving protons from a region of their lower concentration (matrix) to a region of their higher concentration (intermembrane space) is bound to increase their potential energy.
Option (1)
3.10 The primary function of mitochondria is to produce energy in the form of ATP, so if all of the mitochondria die, then we won't have ATP for our body functions.
Option (1)
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