Biochemical Pathways Question
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Imagine that, in a closed system, there is an input of 1 kJ of light. The light energy is converted into glucose, then ATP, then into mechanical energy. Which statement about the amount of mechanical energy available is true?
- There is 1 kJ of mechanical energy available to do work.
- Entropy increases with each conversion, so less than 1 kJ is available.
- All the reactions involved are anabolic, so there is only 0.25 kJ of energy available.
- All the reactions are endergonic, so no mechanical energy is produced.