Question

ADP + pi=ATP what does pi stand for?

Answer 1

A phosphate ion.

Answer 2

okay c

Answer 3

ATP to ADP - Energy Release

This is done by a simple process, in which one of the phosphate molecules is broken off, therefore reducing the ATP from 3 phosphates to 2, forming ADP (Adenosine Diphosphate after removing one of the phosphates {Pi}). This is commonly wrote as ADP + Pi.

Answer 4

Pi usually denotes inorganic phosphate which is the same as a phosphate ion as my learned friends indicated above. The term is used to differentiate this form of phosphate from esters of phosphate.