3.2

Question 1

ATP
IMAGE

Answer 1

• Universal energy currency

Power:

1. Mechanical work
   - beating cillia, muscle movement, chromosome movement
2. Transport work
   • pump substance across membrane against concentration gradient
3. Chemical work

• Chemical Rxn for endergonic rxn

Question 2

ATP Hydrolysis and Free Energy

Answer 2

• ATP contains large amounts of free energy
• Hyrolysis of ATP breaks off an organic phosphate and forms ADP
• also releases -30.5 mol of Gibbs energy

Question 3

Phosphorylation

Answer 3

Phosphorylation

• Attaching phosphate group to another organic molecule
  -Gains free energy
  -Very reactive
• Most work carried out in a cell is dependent on phosphorylation for energy

Question 4

Regeneration of ADP

Answer 4

• Cells makes ATP by combining ADP with Pi
• Reqiures endergonic rxn to gain free energy
• Energy needed for ATP synthesis comes from endergonic rxn
• Forms ATP cycle

Question 5

ATP as Universe Energy Currency

Answer 5

couple to so many
different endergonic
reactions gives ATP its
“universal” characteristic