1.5 - ATP

Question 1

Name the components of an ATP molecule and draw a diagram

Answer 1

• adenine molecule
• ribose molecule
• 3 phosphate groups

Question 2

What does ATP stand for?

Answer 2

adenosine triphosphate

Question 3

Write the equation for the hydrolysis of ATP and name the enzyme that catalyses this reaction

Answer 3

ATP + water + energy -> ADP + Pi

ATP hydrolase

Question 4

What can inorganic phosphates be used for?

Answer 4

phosphorylation of other compounds to make them more reactive

Question 5

Write the equation for the synthesis of ATP and name the enzyme that catalyses this reaction

Answer 5

ADP + Pi -> ATP + water + energy

ATP synthase

NB: occurs during photosynthesis/respiration

Question 6

Name the advantageous properties of ATP

Answer 6

• immediate source of energy (more desirable than glucose) = can be broken down in a single step to release manageable quantity of energy
• not stored in large quantities = can easily be reformed in seconds
• used in a variety of ways e.g AT, metabolic process, activation of molecules etc.