In a cell, many chemical reactions occur, controlled by enzymes, where large molecules are made from smaller ones (endothermic) or broken down into smaller ones (exothermic).
En una célula ocurren muchas reacciones químicas controladas por enzimas, donde moléculas grandes se forman a partir de moléculas pequeñas (endotérmicas) o se descomponen en moléculas más pequeñas (exotérmicas).
| Text | In a cell there are lots of chemical reactions happening all the time, which are controlled by enzymes. In some of these reactions, large molecules are made from smaller one, they are endothermic. In other reactions, large molecules are broken down into smaller ones - they are exothermic. |
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