1B - ATP Flashcards
What is the function of ATP?
Immediate source of energy in a cell.
What does ATP stand for?
Adenosine triphosphate.
What is ATP made of?
Adenine, Ribose, 3 phosphate groups.
How does ATP move around the cell?
Diffusion
Where is the energy in ATP stored?
In high energy bonds between the phosphate groups.
How is the energy in ATP released?
Via a hydrolysis reaction where a phosphate group is removed.
When energy is needed by a cell what is ATP broken down into?
ADP and Pi.
Adenosine diphosphate and an inorganic phosphate.
What is the hydrolysis reaction breaking down ATP catalysed by?
ATP hydrolase.
What can ATP hydrolysis be ‘coupled’ to and why?
To other energy-requiring reactions in the cell so that the energy released can be used directly to make the coupled reaction happen, rather than being lost as heat.
What can the inorganic phosphate released during ATP hydrolysis be used for?
Added to another compound (phosphorylation) which often makes the compound more reactive.
What is it called when the inorganic phosphate is added to another compound to make it more reactive?
Phosphorylation
How can ADP be resynthesised?
By a condensation reaction between ADP and Pi.
When is ADP resynthesised?
During respiration and photosynthesis.
What is the condensation reaction of ADP catalysed by?
ATP synthase.
What does ADP stand for?
Adenosine diphosphate.
