ATP

Question 1

ATP stands for?
what are the components?
what happens when you hydrolyse/break down ATP?
what enzyme catalyses break down of ATP?

Answer 1

• adenosine triphosphate
• pentose sugar: ribose, 3 phosphates, adenine
• produce adenosine diphosphate (ADP), an inorganic phosphate group (Pi)
• ATP hydrolase

Question 2

what can the Pi released during the hydrolsis of ATP be used for? explain simply?
how do we get ATP back from ADP and Pi?
this condensation reaction is catalysed by…
when does this going back to ATP happen in the body of living things?

Answer 2

• to phosphorylate other compounds basically add Pi to other compounds
• resynthesise via condensation reaction
• ATP synthase
• respiration and photosynthesis

Question 3

features of atp? (6)

Answer 3

• releases in small quantities
• immediate energy source
• single step reaction
• rapdily re-synthesised
• insoluble
• doesn’t leave the cell

Question 4

why do we need to synthesise such a large amount of ATP each day? (2)

Answer 4

• releases small quantities of energy
• unstable can’t be stored

Question 5

what are the uses of ATP in organisms (5)

Answer 5

• active transport: energy needed to change the shape of carrier proteins
• provides energy and phosphate to make molecules more reactive (lowers activation energy)
• muscle contraction
• building macromolecules
• secretion