3.1.6 - ATP

Question 1

structure of ATP

Answer 1

adenosine triphosphate:
- ribose sugar
- adenine base
- 3 phosphate groups
(nucleotide derivative)

Question 2

hydrolysis of ATP

Answer 2

• hydrolysis reaction
• requires ATP
• water molecule used
• catalysed by ATP hydrolase (ATPase)
• coupled to energy-requiring reactions within cells (provides energy for other reactions)

Question 3

synthesis of ATP

Answer 3

• condensation reaction
• requires ADP + P_i
• water molecule produced
• catalysed by ATP synthase

Question 4

features of ATP as an energy source

Answer 4

• releases relatively small/manageable amount of energy
• releases energy instantaneously/energy is readily available/immediate source
• phosphorylates other compounds, making them more reactive
• can be rapidly re-synthesised
• not lost from/does not leave cells