ATP

Question 1

describe the structure of ATP

Answer 1

ribose bound to a molecule of adenine and 3 phosphate groups

Question 2

describe how ATP is broken down

Answer 2

ATP (+water)= ADP+phosphate group
-hydrolysis requires a molecule of water which is catalysed by ATP hydrolase

Question 3

what ways is ATP used in cells

Answer 3

-inorganic phosphate released can be used to phosphorylate other compounds making them more reactive
-coupled to energy requiring reactions within cells

Question 4

describe how ATP is resynthesised in cells

Answer 4

condensation reaction between ADP+Pi - ATP(+water) removes a molecule of water. This is catalysed by ATP synthase during respiration and photosynthesis

Question 5

suggest how the properties of ATP make it a suitable immediate source of energy for cells

Answer 5

-releases energy is small amounts so little energy is lost as heat
-single reaction is hydrolysed to release energy

Question 6

what processes is ATP used in

Answer 6

-movement
-metabolic processes
-active transport
-secretion
-activation of molecules