Biological molecules AQA AS Biology PART 6 of 8 TOPICS: ATP

Summary on the key ideas of ATP based on AQA spec. Its shorter than you think!!!!!!!!!!!!!!!!!!!!

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Biological molecules (AQA AS Biology) PART 6 of 8 TOPICS
ATP (Adenosine triphosphate) is a single molecule made up of adenine, ribose and three inorganic
phosphate groups.
ATP is made in a condensation reaction between ADP (Adenosine diphosphate) and and inorganic
phosphate group (Pi) and is catalysed by the enzyme ATP synthase. The reverse reaction is hydrolysis
is catalysed by the enzyme ATP hydrolase. NB: A tip on remembering what each enzyme does to
avoid confusion; Synthase sounds like synthesis which means to make something therefore ATP
Synthase helps to make ATP. As one enzyme makes ATP the other breaks it.
Hydrolysis can be coupled to energy required reactions such as respiration within cells which is
covered in a powerpoint made for A2 AQA Biology.
The inorganic phosphates can be used to phosphorylate other compounds often to make them more
] As you can see, ATP is quite a small topic at AQA. This is all based on the exam boards spec which is
explained in a little more detail to help you understand the points which are only said briefly on the
specification [


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