ATP

Question 1

What is ATP?

Answer 1

ATP is the immediate source of energy for biological process. ATP is a nucleotide derivative

Question 2

Explain the hydrolysis of ATP

Answer 2

ATP is hydrolysed into ADP + Pi and is catalysed by the enzyme ATP hydrolase. This is for 2 reasons:

1) Energy released for energy requiring reactions
2) Phosphate (Pi) can be added to other compounds. This is called phosphorylation

Question 3

Explain the Condensation of ATP

Answer 3

ATP is resynthesised by condensation of ADP + Pi which is catalysed by the enzyme ATP Synthase. During stages or resp. + photosyn. enough energy is released to phosphorylate ADP to ATP. Heat is a by product of respiration

Question 4

Uses of ATP

Answer 4

• Active transport
• Muscle Contraction
• Making Proteins
• Cell division
• Respiration (stage - glycolysis)

Question 5

Features of ATP

Answer 5

1) Universal to all organisms
2) Easily Moveable as its soluble
3) Release of energy is a single reaction
4) Immediate Source of Energy

Question 6

Explain why ATP must be made in large amounts

Answer 6

1) It is unstable and breaks down
2) Cannot be stored in large amounts
3) Continually being used in processes
4) Only releases a small amount of energy when hydrolysed