Chapter 8.2 (Exam 2) ATP

Question 1

What is the function of ATP (adenosine triphosphate)?

Answer 1

ATP (adenosine triphosphate) captures and transfers free energy.

Question 2

How does ATP transfer free energy? What is the reaction involved?

Answer 2

ATP can be hydrolyzed to ADP and Pi , releasing a lot of energy for endergonic reactions.

ATP + H₂O –> ADP + P_i + free energy

Question 3

What can ATP do to other molecules?

Answer 3

ATP can also phosphorylate (donate a phosphate group to) other molecules, which gain some energy.

Question 4

The formation of ATP is endergonic. This means it absorbs energy. What is the reaction for ATP formation?

Answer 4

ADP + P_i + free energy –> ATP + H₂O

Question 5

What is a crucial example of coupled endergonic and exergonic reactions?

Answer 5

Formation and hydrolysis of ATP couple endergonic and exergonic reactions

Question 6

What type of coupled reactions is very common in metabolism?

Answer 6

Coupling of exergonic and endergonic reactions