Study Biology notes on Respiration for Secondary. Useful for revision, homework, and exam preparation in Zimbabwe.
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Respiration What is respiration? Respiration is the chemical process by which organic compounds release energy. The compounds change into different ones by exergonic reactions. There are two types of respiration: - aerobic, which requires oxygen and releases lots of energy - anaerobic, which does not require oxygen but releases much less energy per mole of starting material ATP and cells The hydrolysis of adenosine triphosphate (ATP) to adenosine diphosphate (ADP) and phosphoric acid (Pi) releases energy (it is an exergonic reaction). Some chemical reactions that occur in cells require energy. Hydrolysis reactions of ATP can provide this energy. Hydrolysis of ATP ATP can break down by hydrolysis The reverse of condensation is hydrolysis Both hydrolysis reactions are exergonic, in other words energy is given out Cells must replenish ATP by synthesising it from ADP and phosphoric acid.