1.6-ATP

Question 1

1. What chemical processes produces ATP? Respiration

Answer 1

Respiration

Question 2

What does ATP stand for?

Answer 2

enosine triphosphate

Question 3

1. Write an equation to show how ATP releases energy

Answer 3

H2O + ATP ADP + Pi

Question 4

1. What is the name of the enzyme which catalyses the hydrolysis of ATP?

Answer 4

ATP hydrolase

Question 5

1. What does ADP stand for?

Answer 5

Adenosine diphosphate

Question 6

1. What is Pi? What happens to the ‘Pi’ that is released? What is its function in cells?

Answer 6

• ‘Pi’ is inorganic phosphate. It is the phosphate ion (which has the formula PO43-)
• Phosphate can join onto molecules to make them more reactive
• It has lots of uses in cells, e.g.
o In the phosphate-sugar backbone of DNA and RNA
o In phospholipids

Question 7

1. During which processes is ATP resynthesized? What sort of reaction is this? What is the name of the enzyme which catalyses the reaction?

Answer 7

• ATP is synthesized primarily during respiration (also during photosynthesis)
• This is a condensation reaction
• The reaction is catalysed by ATPsynthase

Question 8

1. What are the key features of ATP which make it an excellent source of energy for cellular reactions? MEMORISE THIS!!!!!

Answer 8

• It releases energy in small amounts
• It is an immediate source of energy as it can release energy in just one step by breaking just one bond so it makes energy available rapidly
• It can add a phosphate group (phosphorylates) other molecules to make them more reactive
• It can be regenerated