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A series of chemical reactions that either builds a complex molecule (anabolic pathway) or breaks down a complex molecule into simpler compounds (catabolic pathways)
a metabolic process that breaks down complex molecules into simpler compounds; example = cellular respiration because it breaks glucose into carbon dioxide and water; the energy that is stored becomes available to do work within the cell
A metabolic pathway that consumes energy to synthesize a complex molecule from simpler compounds.
First law of thermodynamics
energy is conserved. It is neither created nor destroyed underneath normal conditions.
second law of thermodynamics
Every energy transfer or transformation increases the entropy of the universe
When a process can occur on its own without outside help (an input of energy), it increases the entropy of the universe. It doesn't mean quickly.
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