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Respiration

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Question 6

An experiment was conducted on mammalian skeletal muscle cells to study the metabolic effects of different respiration inhibitors. Table 1.1 shows the production rate of three key respiratory markers: ATP, carbon dioxide (CO2\text{CO}_2CO2​), and triose phosphate (TP) in cells treated with antimycin A, 2-deoxyglucose (2-DG), or a control phosphate-buffered saline (PBS) solution containing glucose.

Table 1.1

TreatmentATP (10−10 mol s−1)\text{ATP } (10^{-10}\text{ mol s}^{-1})ATP (10−10 mol s−1)CO2 (10−11 mol s−1)\text{CO}_2\text{ } (10^{-11}\text{ mol s}^{-1})CO2​ (10−11 mol s−1)Triose phosphate (TP) (10−11 mol s−1)\text{Triose phosphate (TP) } (10^{-11}\text{ mol s}^{-1})Triose phosphate (TP) (10−11 mol s−1)
Antimycin A1.851.851.850.000.000.004.654.654.65
2-Deoxyglucose (2-DG)0.000.000.000.000.000.000.000.000.00
Control5.805.805.802.902.902.904.404.404.40

Based on the data in Table 1.1, compare the effects of antimycin A and 2-deoxyglucose (2-DG) on respiration in these cells, and deduce which stage of respiration each inhibitor targets.

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Respiration Questions

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