Carbohydrate
Metabolic reactions that break down complex molecules into smaller compounds, thereby releasing usable energy for the cell, are best described as

photosynthetic
biosynthetic
catalytic
catabolic

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Carbohydrate
Which of the following statements about the energy needs of cells is false?

Many cellular reactions have an associated activation energy
The most usable energy for cells comes from the rapid combustion of glucose
The laws of thermodynamics force cells to acquire energy
Without a continuous input of energy, cell disorder will increase

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