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>Countless chemical reactions take place in cells and are responsible for all the actions of organisms. Together, these reactions make up an organism's metabolism.

>When a chemical reaction takes place energy is either taken in or released.

>Two types of metabolic reactions take place in the cell: 'building up' (anabolism) and 'breaking down' (catabolism). Anabolic reactions use up energy. Catabolic reactions give out energy. They are exergonic.

At the lowest level there are chemical reactions, is it not fair to say that chemical reactions are binary? Either releasing or taking in energy?

Within the cell the net of the chemical reactions is the metabolism which are either anabolic or catabolic.

There is no doubt there are many processes where one reaction triggers the other in an ongoing but the chemical reactions or metabolic reactions (net chemical reactions) are either anabolic or catabolic.

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