Question

Which statement(s) describe the production of ATP from ADP?

Answer 1

The answers that apply are;

• The production of ATP from ADP is non-spontaneous.
• The production of ATP from ADP is endothermic.

The formation of ATP from ADP is not spontaneous (requires energy input) and is why it requires an enzyme (ATP synthase) to reduce the activation energy and catalyze the reaction.  The reaction absorbs energy and this is why ATP is used to reserve energy in the Pi bond for later use (through hydrolysis of the bond).