ATP

Question 1

Describe how an ATP molecule is formed from its component molecules (4 marks)

Answer 1

• Adenine, ribose, and 3 phosphates
• Condensation reaction
• ATP synthase

Question 2

ATP is an energy source used in many cell processes. Give 2 was in which ATP is a suitable energy source for cells to use ( 2 marks)

Answer 2

• Releases relatively small amount of energy
• Releases energy instantaneously
• Phosphorylates other compounds, making them more reactive
• Can be rapidly re-synthesised
• Is not lost from the cells

Question 3

Describe how ATP is resynthesised in cells (2 marks)

Answer 3

• From ADP and Pi
• By ATP synthase
• During respiration/ photosynthesis