3.1.6 ATP

Question 1

ATP definition/structure

Answer 1

• adenosine triphosphate
• nucleic derivative
• 1 molecule of ribose
• one molecule of adenine
• 3 phosphate groups

Question 2

ATP function

Answer 2

Good immediate energy source

• unstabel bonds between phosphate bonds
• cane bt stored for longer than a few seconds
• releases energy in small amounts
• releases energy rapidly in one step
• transferrs energy directly to the reaction requiring it
• diffuses within cells but cant pass out cell

Question 3

Hydrolysis of ATP

Answer 3

ATP + H20 → ADP + Pi

enzyme ATP hydrolase as a catalyst

Question 4

Uses of hydrolysis of ATP

Answer 4

Phosphorlation
-inorganic compound can be used to phosphorylate other compounds and make them more reactive

Can be coupled with energy requiring reactions within cells:

Active transport
-change shape of carrier proteins/ move molecules against conc gradient

Secretion
-to form lysosomes

Movement
-for muscle filaments to slide past each other

Metabolic processes
-make macromolecules from their basic units

Question 5

Condensation of ATP

Answer 5

ADP + Pi → ATP + H20

enzyme ATP synthase as a catalyst

during photosynthesis, or during respiration