Biological Molecules: ATP

Question 1

what is the structure of an ATP molecule?

Answer 1

a molecule of ribose, a molecule of adenine and 3 phosphate groups

Question 2

what is the equation for the hydrolysis of ATP?

Answer 2

ATP + H2O — ADP + Pi
(adenosine triphosphate + water — adenosine diphosphate + inorganic phosphate group)

Question 3

what is the enzyme that catalyses the hydrolysis of ATP?

Answer 3

ATP hydrolase

Question 4

how and when is ATP resynthesised?

Answer 4

condensation of ADP and Pi, during photosynthesis and respiration, catalysed by ATP synthase

Question 5

what is the enzyme that catalyses the resynthesis of ATP?

Answer 5

ATP synthase

Question 6

what is ATP used for?

Answer 6

hydrolysis of ATP to ADP can be coupled to energy-requiring reactions within the cells to provide energy for the reactions

Question 7

what is the inorganic phosphate released during hydrolysis of ATP used for?

Answer 7

to phosphorylate other compounds, often making them more reactive(phosphorylation)

Question 8

what are the uses of ATP hydrolysis in the cell?

Answer 8

• to provide energy for other reactions such as active transport
• to phosphorylate other compounds making them more reactive