how is a molecule of ADP like a rechargeable battery
Because ATP stores energy and releases it turning into ADP in the process. This ADP is then converted back to ATP by the cells so that its energy is ready when required, just like a rechargeable battery.
ATP is like a charged battery
When ATP is used, it becomes ADP or Adenine Di-Phosphate. Adding another phosphate will "recharge" ATP.
ADP is like a partially charged battery that will produce a dim light & ATP is like a fully charged battery that produces a bright light
There are two phosphate groups in one molecule of ADP.
ATP is an energy and molecule it powers all of the cells energy needs somewhat like a battery. ATP is generated when a phosphate (P) group is added to one ADP.
ADP
ADP is like a partially charged battery because there is still energy contained within the bond between the first and second phosphate groups. However, it lacks the "high energy" bond that exists between the second and third phosphate groups in ATP.
An ATP molecule has an extra phosphate group compared to an ADP molecule. This is because ATP has 3 phosphate groups as where ADP only has two phosphate groups.
ADP (Adenosine diphosphate) Technically, ATP breaks into ADP and a molecule of inorganic phosphate.
Because it can be fully charged by an addition of a phosphate group.
A phosphate molecule