Approximately how much calories of free energy is stored in plant biomass for every mole of CO2 fixed during photosynthesis ?
Correct answer: C. 114
- A. 110
- B. 112
- C. 114
- D. 116
Explanation
The conversion of carbon dioxide (CO2) and water (H2O) into glucose (C6H12O6) involves the capture of light energy and its conversion into chemical energy. The actual energy stored in the glucose molecule can then be released through cellular respiration to produce ATP. The estimate of 114 kilocalories per mole of CO2 fixed likely considers the overall efficiency of photosynthesis and subsequent energy transfer processes. However, it's crucial to note that this is an approximation, and the actual energy yield can vary. Different sources and studies might provide slightly different estimates based on specific conditions and assumptions.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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