ATP

Question 1

What does ATP stands for?

Answer 1

Adenosine triphosphate

Question 2

Why does cell require energy?

Answer 2

• Synthesis - e.g. proteins
• Transport - e.g. active transport
• Movement - e.g. protein fibres in musclle cells that cause muscle contraction

Question 3

What are the components of a ATP?

Answer 3

• Three phosphate group
• A ribose
• Adenine group

Question 4

How does ATP release energy?
How much energy is released?

Answer 4

• Large amount of energy is released when the last phosphate group is released from the ATP
• 30.6 KJ/mol

Question 5

What type of reaction is the breaking down of ATP into ADP and Pi?

Answer 5

Hydrolysis

Question 6

Why is ATP a good immediate energy store?

Answer 6

• ATP is unstable, highly reactive
• It is constantly resynthesised
• This means cells do not need a large store of ATP

Question 7

What are the properties of ATP?

Answer 7

• Small - moves easily into, out of and within cells
• Water soluble - energy-requiring processes happen in aqueous environments
• Contains bonds between phosphates with intermediate energy: large enough to be useful for cellular reactions but not so large that energy is wasted as heat
• Releases energy in small quantities - suitable to most cellular needs, so that energy is not wasted as heat
• Easily regenerated - can be recharged with energy